I’ve gone ahead and added some search aliases to Baldi’s Basics Plus to make it match for those alternate titles. The reason why Baldi’s Basics Classic was matching for a lot of cases was because someone on our team added aliases a long time back.
I definitely understand the frustration you’re specifically experiencing, a lot of fan games use similar spellings and can flood the search results with incorrect pages. That was part of the goal of us introducing the autocomplete functionality, to allow the prominent result show up first so that users aren’t confused over misleading matches.
Some of the decisions we made for autocomplete results will likely be reflected in the primary search page at some point, to try to reduce noise from fan projects.