hi how to create advanced search with out plugin, create with form * Support for "+" (must have) and "-" (must not have) * Search title, content, excerpt, taxonomies or comments (or any combination thereof) * Search within a date * Search for at least one word in phrase * Search exact phrase * Search for combinations of exact phrase and any words
Use Google Custom Search - the following links show you how to do it.
I've asked that same question a few weeks ago and i've found the solution for this search issue.
Just go to How to override normal Wordpress search in Buddypress?
Take a look at http://wordpress.org/extend/plugins/relevanssi/