I want a curated search engine so badly. I feel like some enterprising developer could craft one specifically geared towards developers. Imagine a search that doesn't ignore operators like '?.' and where you can set persistent conditions on every single query without having to type it out. This would help prevent you from needing to type in the language you are searching for in every query.
Oh, and the cherry on top is completely abandoning the idea of Natural Language Processing. Go right back to keywords only.