PressSEARCH -- WordPress 插件

PressSEARCH replaces the default WordPress search engine with a powerful search engine that gives the results relevant to the posts. That means the visitors will find the most accurate results.
PressSEARCH provides a powerful AJAX live search that help visitors search and see the results quickly when they are typing like Google search.
PressSEARCH can search through every post types, e.g post, page, or any custom post type. You can also control the search results by assigning a greater weight to the data fields.
PressSEARCH uses search template in your theme to display the search results.
PressSEARCH is packed with a lot of settings, hook actions and filters that allow you to easily extend the plugin’s feature set.

Features:

Search results sorted in the order of relevance.
Ajax live search. Using theme's search form.
Work with any search inputs which have the attribute name="s".
Fuzzy matching: match partial words, if complete words don’t match.
Find documents matching either just one search term (OR query) or require all words to appear (AND query).
Create custom excerpts that show where the hit was made, with the search terms highlighted.
Highlight search terms in the search results.
Search and inndex any custom post types.
Search and index users, tags, categories, custom taxonomies, comments, and custom fields.
Search and index the contents of shortcodes.
Control the search results by assigning a greater weight to the data fields.
Suggestion keywords.
Custom stopwords.
Custom synonyms.
Search result throttling to improve performance on large databases.
Advanced filtering to help hacking the search results the way you want.