Perhaps you should try some spelling variations:
duncan sarah » duncan adam, duncan gray, duncan shaw
hinton smith » fenton smith, hanson smith, huston smith
john duncan » john dunton, john dunning
john hinton » john hilton, john swinton, john dunton

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 duncan sarah ) OR ( john hinton smith )).
• Adding a wildcard symbol may retrieve word variants: (( john duncan sarah ) or ( john hinton smith ))*.