Perhaps you should try some spelling variations:
"a duncan smith" » "a duncan sarah", "a duncan scott", "ra duncan smith", "_ duncan smith", "j duncan smith"
"brian duncan sir" » "bruce duncan sir", "brjon duncan sir", "brinnes duncan sir", "brian duncan i", "brian duncan sarah"
"ian duncan shaw" » "ian duncan sarah", "jon duncan shaw", "innes duncan shaw"
"ian 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 ("brian duncan sir"))) OR ("ian duncan shaw")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a duncan smith\") or (((((\"ian duncan sir\") OR (\"brian duncan sir\"))) or (\"ian duncan shaw\"))))".
• Removing quotes may allow a broader search: (( a duncan smith ) or ((((( ian duncan sir ) OR ( brian duncan sir ))) or ( ian duncan shaw )))).
• Adding a wildcard symbol may retrieve word variants: (("a duncan smith") or ((((("ian duncan sir") OR ("brian duncan sir"))) or ("ian duncan shaw"))))*.