Better Search just got better with the latest release. I’ve added custom post type support, added BOOLEAN mode support and cleaned up quite a bit of code. If you haven’t heard of this plugin yet:
Better Search replaces the default WordPress search engine with a more powerful search engine that gives search results relevant to the title and content of the post. This means that visitors to your blog will find will find what they are looking for quicker than if you didn’t have Better Search installed.
Better Search uses the same algorithm behind Contextual Related Posts to get your visitors to your WordPress blog highly relevant results.