I'm assuming your comment indicates Spotlight/Find didn't work for you?
Find will not locate many of the files inside your library folder. It will locate some, and I'm not sure "what" criteria is used to decide what it will and won't show. While Spotlight will never show these files, if you enable a second option in your find window by clicking the + sign you can set an additional criteria to "System files are included" and guessing your files would have shown up then.
This is intentional to try and prevent novice users from accidentally navigating to an important system file through a find, and doing something detrimental to their mac.