Have you done a Google image search? If you just do a normal Google search, it may give as one of the suggestions, looking it all the related images. But you can choose to make the search in image search by selecting image before you even type in the search terms. Also, I recommend actually going to the google site to do the search- not all of the linked google applications give you the option on searches.
When doing a Google image search, google does not use the same logic or scoring as it does in a web search, but it is still a good idea to put in as many relevant search terms as possible. Ah, for the good old days when google was a pure boolean and search.