jasonstoltz

goodroot

qhoxie

matthewtyriley

afoucret

The Site Search WordPress plugin replaces the standard WordPress search with a polished, customizable, and more relevant search engine. Gain access to deep search insights and all the tools you need to customize and perfect your search experience. Join thousands of growing customers and bring world class search to your website, all backed under the hood by Elasticsearch.
<a href="https://swiftype.com/site-search" rel="nofollow ugc">What is Site Search?</a>
<h3>Features</h3>
<ul>
<li>Fully managed: We secure, store, and search all of your documents in the cloud. Your site stays fast.</li>
<li>No programming required: Works with your theme’s existing search.php template. Drop in the Site Search plugin and it just works.</li>
<li>Out of the box relevance: Pre-optimized typo tolerance, bigram matching, stemming, synonyms, phrase matching, and more.</li>
<li>Automatic Updating: Search results automatically synchronize when you save, delete, or change WordPress content.</li>
<li>Intuitive Dashboard: Use slick and powerful dashboard tools to customize your search relevance.</li>
<li>Deep Insights: Impactful search analytics help you understand your users and guide you to productive actions.</li>
<li>Choose Your Language: Supports 13 languages, including: English, French, German, Russian, Chinese, Japanese, Universal, and more.</li>
</ul>
Read the <a href="https://swiftype.com/documentation/site-search/guides/wordpress" rel="nofollow ugc">Site Search WordPress guide</a> for more details.

Swiftype Site Search Plugin for WordPress

Fast, intelligent, and fully customizable search for your site.

Shambhu Patnaik

Category Wise Search Widget plugin.You have option search specific category content.
Features
<ul>
<li>Search post category wise.</li>
<li>Set default category.</li>
<li>Exclude categories in search category field.</li>
<li>Exclude categories with child in search category field.</li>
</ul>
More detail : http://socialcms.wordpress.com/

Category Wise Search

Category Wise Search Widget plugin.You have option search specific category content.

Swiftype Site Search Plugin for WordPress vs Category Wise Search