I think the old search option resulted in Messages, Topic titles and partial framents - this was the matter of speed. When you search both in Titles and Messages, 2 tables are concatenated, and this dramatically decreases speed, specially on large data. We think, the most often case is when you search in Messages, because in most cases, topic title should contain the same keywords as message. It won't be back, we will just fix this fragment thing somehow - because by fragment it was meant, for example, fragment of the word FROM THE BEGINNING. For example, searching for "option" should return "options", "option", "optional", but not "adoption". Probably, there is some bug, currently search is not working that way.