Yes. Although with Google and other tech giants, they have good security, but really bad privacy. So there is little chance of your Google searches being leaked onto some shady darkweb forum, but a better chance it is being leaked to NSA etc. Also haven't you heard about NSLs[0] & Prism[1]?
[0] https://en.wikipedia.org/wiki/National_security_letter
[1] https://en.wikipedia.org/wiki/PRISM_(surveillance_program)