Perhaps you should try some spelling variations:
brian duncan » ian duncan, bruce duncan
duncan smith » duncan sir, duncan scott
duncan sarah » duncan adam, duncan gray, duncan shaw
jon duncan » john duncan, j duncan, ian 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: (( jon duncan smith ) OR ( brian duncan sarah )).
• Adding a wildcard symbol may retrieve word variants: (( jon duncan smith ) or ( brian duncan sarah ))*.