Perhaps you should try some spelling variations:
dunning sarah » planning sarah, duncan sarah, dunnett sarah
john dunning » john jennings, john dunton, john dennis
hinton smith » fenton smith, huston smith, milton smith
hanson smith » haddon smith, hudson smith, hammon smith

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 dunning sarah ) OR ( john ((hinton smith) OR (hanson smith)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( john dunning sarah ) or ( john ((hinton smith) OR (hanson smith)) ))".
• Adding a wildcard symbol may retrieve word variants: (( john dunning sarah ) or ( john ((hinton smith) OR (hanson smith)) ))*.