Every once in a while I come upon a situation when google's way of searching results in too broad results even if I enclose my search terms in quotation marks.

For example now I've tried to find pages that contain both "py.path" and "path.py" without much success.

I'm currently aware of engines|sites like Google Code Search for searching actual code and (apparently) Stackoverflow for searching QAs, symbolhound that lets me find symbols, and also wikipedia is often a good place to find lists of symbols. But none of these seems to perform very good in matching exactly on search term pairs (or tuples) and use a broad-enough segment of the web.

Is there a website that is good with exactly finding search term pairs? (Why not?)