There's a fairly good write-up on the "Search" feature in our FAQ titled "Searching Forums and Threads
" that may be of some help to you, it describes how to use the search engine that we have.
IMO, our search engine leaves a lot to be desired. I think it searches for each word in a phrase independently irregardless of quote brackets. That's a pretty lousy way but that is how it works, it is what it is.