Perhaps you should try some spelling variations:
"a duncan smith" » "a duncan sarah", "ra duncan smith", "_ duncan smith", "j duncan smith"
"bruce duncan scott" » "bruce duncan scotus", "bruce duncan stone"
"ian duncan sir" » "brian duncan sir", "jon duncan sir", "innes duncan sir", "ian duncan i", "ian 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: (((("a duncan smith") OR ("ian duncan sir"))) OR ("bruce duncan scott"))*.
• Removing quotes may allow a broader search: (((( a duncan smith ) or ( ian duncan sir ))) or ( bruce duncan scott ))*.