Perhaps you should try some spelling variations:
duncan smith » duncan sarah, duncan sir, duncan scott
sutton smith » brunton smith, lawton smith, sutton which
john duncan » john dunton, john dunning
john sutton » john hutton, john cotton, john smeaton

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