Perhaps you should try some spelling variations:
"hugh griffiths, mark griffiths" » "hughes griffith, mark griffiths", "g griffiths, mark griffiths", "hannah griffiths, mark griffiths", "hugh griffiths, mrs griffiths"
"hugh griffiths, a griffiths" » "hughes griffith, a griffiths", "g griffiths, a griffiths", "hannah griffiths, a griffiths", "hugh griffiths, a griffith", "hugh griffiths, _ griffiths", "hugh griffiths, d griffiths"
"nach griffiths, mary griffiths" » "nach griffith, mary griffiths", "dawn griffiths, mary griffiths", "ian griffiths, mary griffiths", "nach griffiths, mrs 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 ("nach griffiths, mary griffiths"))) OR ("hugh griffiths, a griffiths")).
• Removing quotes may allow a broader search: (((( hugh griffiths, mark griffiths ) or ( nach griffiths, mary griffiths ))) or ( hugh griffiths, a griffiths )).
• Adding a wildcard symbol may retrieve word variants: (((("hugh griffiths, mark griffiths") or ("nach griffiths, mary griffiths"))) or ("hugh griffiths, a griffiths"))*.