Perhaps you should try some spelling variations:
duncan smith » duncan sarah, duncan scott
colin duncan » john duncan
ian duncan » brian duncan, a duncan, innes duncan
jon duncan » john duncan, j duncan
duncan sir » duncan i, duncan sarah

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 ((( jon duncan sir ) OR ( colin duncan sir )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ian duncan smith ) or ((( jon duncan sir ) OR ( colin duncan sir ))))".
• Adding a wildcard symbol may retrieve word variants: (( ian duncan smith ) or ((( jon duncan sir ) OR ( colin duncan sir ))))*.