jystewart

When displaying results from a search many people prefer to display the section of the resulting 
post/page that includes the match, rather than the full post or standard excerpt. This plugin adds 
a filter to process search results and only display the content either side of the first result 
for the given search.
<h3>To Do</h3>
<ul>
<li>Add automated tests</li>
<li>Make the padding around results value configurable</li>
<li>Solicit user feedback on further options</li>
</ul>

WP Search Extracts

Display only parts of a result close to matched search term in search results list

mattsgarage

The search functionality in woocommerce doesn’t search by sku by default.
This simple plugin adds this functionality search facility of your site, in both the public site and admin panel
Just install and activate – no config required.
Tested with Woocommerce 1.5.6, 2.0.7, 2.0.18, 2.2.4, 2.2.10, 3.4.4, 4.0.1 and 4.2.0
See the <a href="http://www.mattyl.co.uk/2012/12/11/woocommerce-plugin-to-search-products-by-sku/" title="accompanying blog post" rel="nofollow ugc">Accompanying blog post</a> for more information.

Search by SKU for Woocommerce

Extend the search functionality of woocommerce to include searching of sku

WP Search Extracts vs Search by SKU for Woocommerce