WPFactory - Powerful set of WooCommerce plugins to streamline operations, optimize sales, and boost customer satisfaction. 65 plugins with 5 stars support
SearchWP - Instantly improve the search experience of your WordPress site today with SearchWP, the best WordPress search plugin you can find!
Relevanssi - Relevanssi replaces the standard WordPress search with a better search engine, with lots of features and configurable options.
Ivory Search - Ivory Search is a WordPress search plugin that improves WordPress Search by providing advanced options to extend search or exclude specific content from search.
WebberZone Better Search - Better Search is a WordPress plugin that automatically replaces the default WordPress search with an enhanced contextual based search engine
Search & Filter - Search & Filter for WordPress allows you to build powerful search experiences for your users and customers - help them find the content they are looking for by creating filters for custom fields, taxonomies and more.