Plugins you need to get your projects done
relevance
5 plugins
Relevanssi - A Better Search
Relevanssi replaces the default search with a partial-match search that sorts results by relevance. It also indexes comments and shortcode content.
Search Relevance
Adjust WordPress search results to order by relevance, not by date.
gee Search Plus, improved WordPress search
Extends WordPress search engine to taxonomies, custom fields and media, sorts results by relevance or date, and more. Simple and clean!
Old Post Alert
Remind your visitors about the age of old posts in the comment area - might cut down in irrelevant comments.
EasyfullsearchWP
EasyfullsearchWP is the best way to improve searches, providing more relevant results by controlling many features. Most of fields can be indexed.