Perhaps you should try some spelling variations:
duncan smith » duncan sarah, duncan sir, duncan scott
jon duncan » john duncan, j duncan, ian duncan
ra duncan » mr duncan, j duncan, m duncan
_ duncan » _ dunciad

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) OR (_ duncan)) sir ) OR ( jon duncan smith ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((ra duncan) OR (_ duncan)) sir ) or ( jon duncan smith ))*".