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