I, too, have pasted error messages verbatim into Google queries only to have garbage returned. I did include the error message in quotes. I started filtering sites from the results eg `-site:quora.com site:stackoverflow.com site:github.com` etc to start to get a hint of other developers with similar issues and/or some bug reports and/or documentation and/or source code.
Did you put the error message in quotes? I've never had this problem.