WpFunc

This plugin is a very simple redirect plugin. The Plugin change WordPress’ search context “?s=searched%20word” to permalink “/search/searched+word/” one. Also change “%20″ to “+”. Thanks to Mark Jaquith!

You can highlight searched text in search results. WordPress search system is powerfull but some things not acceptable for me i searched on internet and found this code for theme developers. You can add this special code to your theme. You need to change serach.php and your style.css.