Perhaps you should try some spelling variations:
duncan sarah » duncan adam, duncan gray, duncan shaw
duncan sir » duncan i
jon duncan » john duncan, j duncan, ian duncan
mr duncan » _ duncan, mr dundas

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: (( mr duncan sir ) OR ( jon duncan sarah )).
• Adding a wildcard symbol may retrieve word variants: (( mr duncan sir ) or ( jon duncan sarah ))*.