Perhaps you should try some spelling variations:
duncan smith » duncan scott
duncan sarah » duncan adam, duncan gray, duncan shaw
duncan sir » duncan i
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: (( mr ((duncan sir) OR (duncan sarah)) ) OR ( jon duncan smith )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( mr ((duncan sir) OR (duncan sarah)) ) or ( jon duncan smith ))".
• Adding a wildcard symbol may retrieve word variants: (( mr ((duncan sir) OR (duncan sarah)) ) or ( jon duncan smith ))*.