How do you search for a file name with parenthesis in it?

Was given a ton of files with duplicates, which I need to delete.

The duplicate files all end with "(1)" in the file name, for example: FilenameTest(1).pdf

I'd like to search for all the files with "(1)" in the file name, and then delete them, but spotlight will not search for parenthesis. This seems to be a documented issue (bug?). Is there a syntax or other workaround to force spotlight to return a search with parenthesis?

Thanks in advance.