Perhaps you should try some spelling variations:
duncan smith » duncan sarah, duncan scott
duncan sir » duncan i, duncan sarah
jon duncan » john duncan, j duncan, ian duncan
ra duncan » _ duncan, mr duncan, j duncan

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: (( ra duncan sir ) OR ( jon duncan smith )).
• Adding a wildcard symbol may retrieve word variants: (( ra duncan sir ) or ( jon duncan smith ))*.