This plugin allows you to display related posts with similar words in category, tags, title or by adding special meta key for posts.
Search Results Optimizer learns which results users find useful and automatically prioritizes them in future searches.
Adjust WordPress search results to order by relevance, not by date.
Increase your pageviews and SEO by manually selecting related posts for your content. Easy reciprocal linking of related posts and pages.
WPSearch 2 is the missing site search for your WordPress installation. Install this plugin if you need a fast, relevant, google-like search.
Relevant Search replaces the default WordPress search with relevant results.
A widget to show relevant posts of the current post by categories and tags. 把同类及相同标签的相关文章显示在侧栏上的小工具。
Help Google AdSense distinguish what content is relevant on your website.