Yup, that's one of the more annoying flaws with BGG, and something that never gets addressed by BGG. And yet they have a much better search facility for use when you want to insert something into a post.
Although that better search is still ultimately fatally flawed as well...
Yeah you have much greater success googling things then adding bgg at the end, because google is pretty damned sophisticated compared to bgg's search. Bigger budget I guess?