If you're referring this "b" forum, then I click on Search, go to Advanced Search, and then you can type in words and specify if you'd like to search just Threads or all Posts.
If you're referring this "b" forum, then I click on Search, go to Advanced Search, and then you can type in words and specify if you'd like to search just Threads or all Posts.
For any given forum you can search well by using Google advanced search, which allows you to limit the search to the website. For a general search, I have found Google to work better than essentially all the built in searches as it does a better job of handling the search terms.