Nice trick indeed, but it brings multiple results up, which don't have a single thanks.
You can get similar results, if you use the BHW advanced search and search for "keyword" in title in the desired section(s), then order the results by replies. The amount of replies will indicate pretty much the same thing as the amount of thanks and you won't get irrelevant results like you do on Google, because it's not capable of searching by section. E.g. if you search for methods, you don't need results from the BST section or the lounge.
BHW search was broken before the forum re-design(i guess that's when many of us got used to searching with Google instead of the built-in search), but since then it works great.