Perhaps you should try some spelling variations:
"a duncan smith" » "a duncan sir", "a duncan scott", "ra duncan smith", "_ duncan smith", "j duncan smith"
"ian duncan sarah" » "ian duncan adam", "ian duncan gray", "ian duncan sir", "brian duncan sarah", "ra duncan sarah", "jon duncan sarah"
"ian duncan shaw" » "brian duncan shaw", "ra duncan shaw", "jon duncan shaw"

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 sarah") OR ("ian duncan shaw")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a duncan smith\") or (((\"ian duncan sarah\") OR (\"ian duncan shaw\"))))".
• Removing quotes may allow a broader search: (( a duncan smith ) or ((( ian duncan sarah ) OR ( ian duncan shaw )))).
• Adding a wildcard symbol may retrieve word variants: (("a duncan smith") or ((("ian duncan sarah") OR ("ian duncan shaw"))))*.