jas8522

websavers

This plugin adds a new report under the WooCommerce Stock tab that provides inventory reports and allows 
SKU sorting.

WooCommerce Advanced SKU Reports

This plugin enables inventory reports sorted by SKU

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

WooCommerce Advanced SKU Reports vs Search by SKU for Woocommerce