superann

This plugin makes the WordPress built-in search ignore HTML tags in post content.
By default, the WordPress built-in search considers HTML tags in post content to be searchable content. This behaviour often yields unexpected results. For example, a search for the keyword “strong” returns posts with any tags in them, “title” returns posts with any HTML tags that have a title attribute (such as all the <img> tags that you insert via the post editor media buttons)… and so on.

Search Exclude HTML Tags

Makes the built-in search ignore HTML tags in post content.

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

Search Exclude HTML Tags vs Search by SKU for Woocommerce