Perhaps you should try some spelling variations:
"hugh griffiths, mrs griffiths" » "hughes griffith, mrs griffiths", "nach griffiths, mrs griffiths", "hannah griffiths, mrs griffiths", "hugh griffiths, mrs griffith", "hugh griffiths, _ griffiths", "hugh griffiths, d griffiths"
"g griffiths, mark griffiths" » "g griffiths, a griffiths", "_ griffiths, mark griffiths", "d griffiths, mark griffiths", "a griffiths, mark griffiths"
"g griffiths, mary griffiths" » "g griffiths, a griffiths", "_ griffiths, mary griffiths", "d griffiths, mary griffiths", "a griffiths, mary 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, mrs griffiths") OR ((("g griffiths, mark griffiths") OR ("g griffiths, mary griffiths")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"hugh griffiths, mrs griffiths\") or (((\"g griffiths, mark griffiths\") OR (\"g griffiths, mary griffiths\"))))".
• Removing quotes may allow a broader search: (( hugh griffiths, mrs griffiths ) or ((( g griffiths, mark griffiths ) OR ( g griffiths, mary griffiths )))).
• Adding a wildcard symbol may retrieve word variants: (("hugh griffiths, mrs griffiths") or ((("g griffiths, mark griffiths") OR ("g griffiths, mary griffiths"))))*.