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