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