Searching on camera model metadata

I want to search for files on the basis of metadata, specifically on camera make and sometimes camera model. I've tried using Tools-Find files-Advanced-Document-Match-Samsung but with no result.
I know that I can add clauses but I see no provision to add clauses for camera make, exposure time etc. Can anyone help?
Thank you
Robert, Australia

Document is the wrong clause type. Try Image > Camera Model.

Bingo! Great service and a great program. Thanks Leo.