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" » "hughes griffith, a griffiths", "g griffiths, a griffiths", "nach griffiths, a griffiths", "hugh griffiths, a griffith", "hugh griffiths, _ griffiths", "hugh griffiths, d griffiths"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"hugh griffiths, mark griffiths\") OR (\"hugh griffiths, a griffiths\"))".
• Removing quotes may allow a broader search: (( hugh griffiths, mark griffiths ) OR ( hugh griffiths, a griffiths )).
• Adding a wildcard symbol may retrieve word variants: (("hugh griffiths, mark griffiths") OR ("hugh griffiths, a griffiths"))*.