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