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