Contesio

Bring a REAL search engine into your WordPress website in 5 minutes, for free!
Smart Search enhances the WordPress search engine by querying Microsoft BING and its Search API. 
The search query is performed in the context of your website url, just like you would type the following search query on BING:
<pre><code>site:http://www.yourblog.com find this and that in New York
</code></pre>
<h4>Brief</h4>
URLs from the BING result set are converted by Smart Search to WordPress post IDs, thus the display process is the same your theme implements for regular searches. 
Search results come from Microsoft BING. This means semantics and relevance on board!!
You can also choose to cache the search engine’s results for a defined period of time, which basically means that your site will load a little bit faster if the same search query is used.
In order to use it, you must have a valid <a href="https://datamarket.azure.com/account/keys" title="Create Windows Account key" rel="nofollow ugc">Windows Account key</a> and you will need to activate at least the <a href="https://datamarket.azure.com/dataset/8818F55E-2FE5-4CE3-A617-0B8BA8419F65" title="BING Search API | Web Results only plan" rel="nofollow ugc">free subscription here</a> or <a href="https://datamarket.azure.com/dataset/bing/search" title="Activate your Bing Search API plan" rel="nofollow ugc">here</a>
Easy, simple and fast! 
If this is your way and fits your needs, you could consider <a href="mailto:cristian@contesio.com" title="Get notified about Smart Search Pro" rel="nofollow ugc">Smart Search Pro</a> and its extended features.
Note: your blog content must be indexed by BING in order to see the matching result set. <a href="http://www.bing.com/toolbox/submit-site-url" title="Start indexing your site with BING" rel="nofollow ugc">Go here</a> to submit yuor site to BING. 
Feel free to leave a <a href="https://wordpress.org/support/view/plugin-reviews/smart-search" title="Review this plugin" rel="ugc">review here</a>. To get in touch with me you can <a href="mailto:cristian@contesio.com" title="Contact Smart Search developer" rel="nofollow ugc">drop me an email</a>.
<h4>Features</h4>
<ul>
<li>Works with built-in post types. Custom post types are supported as well</li>
<li>Highlight occurences in search results with custom background and text color</li>
<li>Auto detect misspelling and synonyms words</li>
<li>For post title and post excerpt, whether to display the WordPress or the BING one</li>
<li>Define how long to store search results for each query. This cuts down response time and saves transaction amount</li>
<li>Custom endpoint for empty search results</li>
<li>Use a custom domain as the search context, useful for testing purposes</li>
</ul>

Smart Search Engine

Smart Search replaces the native WordPress search engine by giving relevance to what matters. Results are displayed according to your current theme.

webvitaly

<ul>
<li><a href="http://web-profile.net/wordpress/plugins/" title="WordPress Pro plugins" rel="nofollow ugc">WordPress Pro plugins</a></li>
<li><a href="http://web-profile.net/wordpress/plugins/extra-shortcodes/" title="Extra Shortcodes" rel="nofollow ugc">Extra Shortcodes</a></li>
<li><a href="http://web-profile.net/donate/" title="Donate" rel="nofollow ugc">Donate</a></li>
<li><a href="https://github.com/webvitalii/extra-shortcodes" title="Fork" rel="nofollow ugc">GitHub</a></li>
</ul>
<h4>Shortcodes:</h4>
<ul>
<li><code>[extra_archives]</code> – list of monthly archives links sorted by date;</li>
<li><code>[extra_archives type="yearly"]</code> – list of yearly archives links;</li>
<li><code>[extra_archives type="monthly"]</code> – list of monthly archives links;</li>
<li><code>[extra_archives type="weekly"]</code> – list of weekly archives links;</li>
<li><code>[extra_archives type="daily"]</code> – list of daily archives links;</li>
<li><code>[extra_archives type="postbypost"]</code> – list of all posts links sorted by date;</li>
<li><code>[extra_archives type="alpha"]</code> – list of all posts links sorted by title;</li>
<li><code>[extra_taxonomies]</code> – list of categories, tags or any other taxonomies;</li>
<li><code>[bloginfo show="name"]</code> – <a href="https://codex.wordpress.org/Function_Reference/get_bloginfo" rel="nofollow ugc">bloginfo params</a>;</li>
<li><code>[date format="l jS \\of F Y h:i:s A"]</code> – Monday 23rd April 2012 09:37:57 AM; <a href="http://php.net/manual/en/function.date.php" rel="nofollow ugc">php date format params</a>;</li>
<li><code>[date format="l jS \\of F Y h:i:s A" timestamp="+2 years +3 months -20 days -10 hours +30 minutes"]</code> – Thursday 3rd July 2014 06:52:57 AM; <a href="http://www.php.net/manual/en/datetime.formats.relative.php" rel="nofollow ugc">relative datetime formats</a>;</li>
<li><code>[date format="h:i:s A" use_wordpress_timezone="1"]</code> – use WordPress timezone from Settings section;</li>
<li><code>[date_i18n format="l jS \\of F Y h:i:s A" timestamp="+2 years +3 months -20 days -10 hours +30 minutes"]</code> – Четвер, 3 Липня 2014 06:52:57; shortcode based on <a href="https://codex.wordpress.org/Function_Reference/date_i18n" rel="nofollow ugc">date_i18n</a>;</li>
<li><code>[time format="h:i:s A"]</code> – 01:35:08 PM; <a href="http://php.net/manual/en/function.date.php" rel="nofollow ugc">php time format params</a>;</li>
<li><code>[year]</code> – 2012, <code>[year plus="3"]</code> – 2015, <code>[year minus="2"]</code> – 2010;</li>
<li><code>[month]</code> – 4 (in April), <code>[month plus="10"]</code> – 2, <code>[month minus="8"]</code> – 8;</li>
<li><code>[month_name]</code> – April, <code>[month_name plus="10"]</code> – February, <code>[month_name minus="8"]</code> – August;</li>
<li><code>[day]</code> – 8, <code>[day plus="3"]</code> – 11, <code>[day minus="2"]</code> – 6;</li>
<li><code>[weekday]</code> – Monday, <code>[weekday plus="5"]</code> – Saturday, <code>[weekday minus="5"]</code> – Wednesday;</li>
<li><code>[hours]</code>, <code>[minutes]</code>, <code>[seconds]</code>;</li>
</ul>
<a href="https://wordpress.org/plugins/extra-shortcodes/other_notes/" title="Extra Shortcodes" rel="ugc">more info about shortcodes</a>
<h4>Useful:</h4>
<ul>
<li><a href="https://wordpress.org/plugins/page-list/" title="list of pages with shortcodes" rel="ugc">“Page-list” – show list of pages with shortcodes</a></li>
<li><a href="https://wordpress.org/plugins/iframe/" title="embed content" rel="ugc">“Iframe” – embed content</a></li>
<li><a href="http://web-profile.net/wordpress/plugins/" title="WordPress Pro plugins" rel="nofollow ugc">WordPress Pro plugins</a></li>
</ul>
<h4>Parameters for [extra_archives]:</h4>
<ul>
<li><code>[extra_archives]</code> – list of monthly archives links sorted by date;</li>
<li><code>[extra_archives type="yearly"]</code> – list of yearly archives links;</li>
<li><code>[extra_archives type="monthly"]</code> – list of monthly archives links;</li>
<li><code>[extra_archives type="weekly"]</code> – list of weekly archives links;</li>
<li><code>[extra_archives type="daily"]</code> – list of daily archives links;</li>
<li><code>[extra_archives type="postbypost"]</code> – list of all posts links sorted by date;</li>
<li><code>[extra_archives type="alpha"]</code> – list of all posts links sorted by title;</li>
<li>limit – how many links to be included in the list: <code>[extra_archives limit="10"]</code>; by default all links are shown: <code>[extra_archives limit=""]</code>;</li>
<li>show_post_count – display counter of posts in the archive: <code>[extra_archives show_post_count="1"]</code>; by default counter is not shown: <code>[extra_archives show_post_count="0"]</code>;</li>
<li>order – how to sort archives links: <code>[extra_archives order="ASC"]</code>; by default links are sorted by descending order (Z-A): <code>[extra_archives order="DESC"]</code>;</li>
</ul>
[extra_archives] is based on <a href="https://codex.wordpress.org/Function_Reference/wp_get_archives" rel="nofollow ugc">wp_get_archives function</a>.
<h4>Parameters for [extra_taxonomies]:</h4>
<ul>
<li>orderby – sort list by specific field: <code>[extra_taxonomies order="count"]</code>; by default list is sorted by name: <code>[extra_taxonomies order="name"]</code>; possible values: ID, name, slug, count, term_group;</li>
<li>order – the sort order of the list of pages (either ascending or descending): <code>[extra_taxonomies order="DESC"]</code>; by default: <code>[extra_taxonomies order="ASC"]</code>; possible values: ASC, DESC;</li>
<li>show_count – display counter of posts in the list: <code>[extra_taxonomies show_count="1"]</code>; by default counter is not shown: <code>[extra_taxonomies show_count="0"]</code>;* limit – how many links to be included in the list: <code>[extra_archives limit="10"]</code>; by default all links are shown: <code>[extra_archives limit=""]</code>;</li>
<li>hide_empty – show or hide empty categories or taxonomies: <code>[extra_taxonomies hide_empty="0"]</code>; by default empty categories are hidden: <code>[extra_taxonomies hide_empty="1"]</code>;</li>
<li>use_desc_for_title – use description for title: <code>[extra_taxonomies use_desc_for_title="0"]</code>; by default the description is used as link title: <code>[extra_taxonomies use_desc_for_title="1"]</code>;</li>
<li>child_of – only display categories that are children of the category identified by this parameter: <code>[extra_taxonomies child_of="77"]</code>;</li>
<li>exclude – exclude one or more categories (comma-separated list of category ids) from the results: <code>[extra_taxonomies exclude="5,7,9"]</code>;</li>
<li>exclude_tree – exclude category-tree (comma-separated list of category ids) from the results: <code>[extra_taxonomies exclude_tree="5,7,9"]</code>; The parameter include must be empty. If the hierarchical parameter is true, then use exclude instead of exclude_tree.</li>
<li>include – only include the categories detailed in a comma-separated list by category id: <code>[extra_taxonomies include="5,7,9"]</code>;</li>
<li>hierarchical – list is hierarchical (tree-like) or flat: <code>[extra_taxonomies hierarchical="0"]</code>; by default the list is hierarchical: <code>[extra_taxonomies hierarchical="1"]</code>;</li>
<li>number – sets the number of categories to display: <code>[extra_taxonomies number="10"]</code>; by default the number is unlimited: <code>[extra_taxonomies number=""]</code>;</li>
<li>depth – how many levels in the hierarchy of pages are to be included in the list: <code>[extra_taxonomies depth="3"]</code>; by default the depth is unlimited: <code>[extra_taxonomies depth="0"]</code>;</li>
<li>taxonomy – show list of registered taxonomy: <code>[extra_taxonomies taxonomy="post_tag"]</code>; by default shows the list of categories: <code>[extra_taxonomies taxonomy="category"]</code>;</li>
</ul>
[extra_taxonomies] is based on <a href="https://codex.wordpress.org/Template_Tags/wp_list_categories" rel="nofollow ugc">wp_list_categories function</a>.
<h4>Parameters for [bloginfo]:</h4>
<ul>
<li><code>[bloginfo show="name"]</code> – <a href="https://codex.wordpress.org/Function_Reference/get_bloginfo" rel="nofollow ugc">bloginfo params</a>;</li>
<li><code>[site_name]</code> – Name of the site;</li>
<li><code>[site_desc]</code> – Description of the site;</li>
<li><code>[site_url]</code> – http://site.url;</li>
<li>
<code>[wp_version]</code> – 4.5 (WordPress version);
[bloginfo] is based on <a href="https://codex.wordpress.org/Function_Reference/bloginfo" rel="nofollow ugc">bloginfo function</a>.
</li>
</ul>
<h4>Parameters for [date]:</h4>
<ul>
<li><code>[date format="l jS \\of F Y h:i:s A"]</code> – Monday 23rd April 2012 09:37:57 AM; <a href="http://php.net/manual/en/function.date.php" rel="nofollow ugc">php date format params</a>;</li>
<li><code>[date format="l jS \\of F Y h:i:s A" timestamp="+2 years +3 months -20 days -10 hours +30 minutes"]</code> – Thursday 3rd July 2014 06:52:57 AM; <a href="http://www.php.net/manual/en/datetime.formats.relative.php" rel="nofollow ugc">relative datetime formats</a>;</li>
<li><code>[date format="h:i:s A" use_wordpress_timezone="1"]</code> – use WordPress timezone from Settings section;</li>
<li><code>[date_i18n format="l jS \\of F Y h:i:s A" timestamp="+2 years +3 months -20 days -10 hours +30 minutes"]</code> – Четвер, 3 Липня 2014 06:52:57; shortcode based on <a href="https://codex.wordpress.org/Function_Reference/date_i18n" rel="nofollow ugc">date_i18n</a>;</li>
<li><code>[time format="h:i:s A"]</code> – 01:35:08 PM; <a href="http://php.net/manual/en/function.date.php" rel="nofollow ugc">php time format params</a>;</li>
<li><code>[year]</code> – 2012, <code>[year plus="3"]</code> – 2015, <code>[year minus="2"]</code> – 2010;</li>
<li><code>[month]</code> – 4 (in April), <code>[month plus="10"]</code> – 2, <code>[month minus="8"]</code> – 8;</li>
<li><code>[month_name]</code> – April, <code>[month_name plus="10"]</code> – February, <code>[month_name minus="8"]</code> – August;</li>
<li><code>[day]</code> – 8, <code>[day plus="3"]</code> – 11, <code>[day minus="2"]</code> – 6;</li>
<li><code>[weekday]</code> – Monday, <code>[weekday plus="5"]</code> – Saturday, <code>[weekday minus="5"]</code> – Wednesday;</li>
<li><code>[hours]</code>, <code>[minutes]</code>, <code>[seconds]</code>;</li>
</ul>

Extra Shortcodes

[extra_archives], [extra_taxonomies], [bloginfo show="name"], [date format="l jS \of F Y"], [date_i18n], [time]

Smart Search Engine vs Extra Shortcodes