Perhaps you should try some spelling variations:
cedric griffiths » henry griffiths, marie griffiths, r.c griffiths
andrew griffiths » matthew griffiths, randall griffiths, de griffiths
teaching amanda » teaching agenda, teaching manual, learning amanda

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: john ((((cedric griffiths) OR (andrew griffiths))) OR (((andrew griffin) OR (landrum griffin)))) teaching amanda.
• The words AND, OR and NOT may confuse the search; try adding quotes: "john ((((cedric griffiths) OR (andrew griffiths))) or (((andrew griffin) or (landrum griffin)))) teaching amanda".
• Adding a wildcard symbol may retrieve word variants: john ((((cedric griffiths) OR (andrew griffiths))) or (((andrew griffin) or (landrum griffin)))) teaching amanda*.