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