Perhaps you should try some spelling variations:
"hugh griffiths, mark griffiths" » "hughes griffith, mark griffiths", "g griffiths, mark griffiths", "nach griffiths, mark griffiths", "hugh griffiths, mary griffiths", "hugh griffiths, mrs griffiths", "hugh griffiths, a griffiths"
"d griffiths, mark griffiths" » "d griffiths, mary griffiths", "d griffiths, mrs griffiths", "d griffiths, a griffiths", "_ griffiths, mark griffiths"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("hugh griffiths, mark griffiths") OR ("d griffiths, mark griffiths")).
• Removing quotes may allow a broader search: (( hugh griffiths, mark griffiths ) or ( d griffiths, mark griffiths )).
• Adding a wildcard symbol may retrieve word variants: (("hugh griffiths, mark griffiths") or ("d griffiths, mark griffiths"))*.