It's been a while since I've researched it, but last time I tried I found it very difficult to find any good info out there because googling for Search +any term inevitably comes up with a slew of SEO links. Do you know of any good resources for information regarding building a full text searching program? I'd like to build a set of search utilities geared towards my own requirements, but aside from some basic algebra surrounding vector math that's fairly obvious, I haven't had much luck in finding resources.