I would put the name of the picture like "Mary's Cottage" at the end of your title instead of the front and the change up what words you use in the title. If I am looking for a specific picture I might search for "old blue truck photo". Those are the words you need right up front in titles and repeat those words in the tags.
I think photography is a tough sell. My friends selling photos here are struggling. Expanding into greeting cards, shirts, coffee mugs etc. is helpful. Find a niche and go as original as possible with subject matter so you can be found.