Unfortunately, our ability to search the content of posts on BNet at this time is limited. We don't expose a feature that would give you what it sounds like you seek - text search for posts in a group. Better forum post searching is a subject that's come up a few times, but sadly we've had to put it off for higher priority tasks. It's definitely on our minds, however. In the meantime, don't be afraid to ask questions even if they've been asked already! In the worst case, someone will redirect you to a post they know about. This makes me want to create a wiki for BNet Platform resources and help. Hmm, that may have to become a thing, even if unofficially.