The Plugin Workshops are designed to help users install, configure and get the basics for our commonly used plugins.
Relevanssi – A Better Search replaces the default search with a partial-match search that sorts results by relevance. It also indexes comments and shortcode content. From the repository:
Relevanssi replaces the standard WordPress search with a better search engine, with lots of features and configurable options. You’ll get better results, better presentation of results – your users will thank you.