gigablast coder here. i noticed if you search for 'pyopengl glclipplane' it gets it. ('python' does not occur anywhere on the page!) i think this is a synonym issue. 'opengl python' should be synonymous with 'pyopengl'. i think google gets this because they have billions of queries from which to derive synonyms. i'll be adding more synonyms to gigablast over time and hope to close this synonym gap.

that being said, i think 90% of the bad search results come from the index being too small (straight up lacking the best web page), or not having good enough synonyms.