I never found Google Code Search useful. What I wanted to be able to do was to search for code expressions with Google -- to be able, for instance, to search for the words "C++" or "call-next-method", exactly as I type them, punctuation and casing and all. No synonyms, no "corrections", no singular/plural conversions, no punctuation-stripping. Google never provided a way to search for exactly what I asked it to search for. Still the main thing missing from google search.