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