Curse used to allow searching for two letter words. I am not sure why that feature was dropped but there's far too many cases when all you can search for is something like BG or XP or CC or DR and so on. Authors will rarely put full words into the titles like crowd control or diminishing returns and so on. They will mention it in the description but I haven't seen the option to include addon description when searching for addons on curse.
Please please either bring back two letter searches or give us the ability to search by addon description as well as title.