Perhaps you should try some spelling variations:
john griffiths » john griffith, john griffin, von griffith
col griffiths » l griffiths, tom griffiths, paul griffiths
bob griffiths » tom griffiths, _ griffiths, d griffiths
dot griffiths » d griffiths, de griffiths, tom 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: ((((col griffiths) OR (john griffiths))) OR (((bob griffiths) OR (dot griffiths)))).
• Adding a wildcard symbol may retrieve word variants: ((((col griffiths) or (john griffiths))) or (((bob griffiths) or (dot griffiths))))*.