Google is unfriendly to searching for verbatim strings with characters like $ and #. Is there a search engine that supports searching for verbatim strings?
I'm aware of this question that was asked a while ago, but didn't get any good answers. I'm ready to put a bounty if I still can't get an answer. Of course it's entirely possible that there isn't one, but I want to be sure :)
EDIT: Quotes don't work. Google strips symbols even when quoted.
Example query: make "$<", for the $< variable in makefiles.
Try http://www.symbolhound.com .
This seems to solve your problem. SymbolHound is a search engine that doesn't ignore symbols or special characters in web queries like google does. It's not a source code search, either. Hope that helps!