Perhaps you should try some spelling variations:
"ian duncan smith" » "ian duncan sarah", "ian duncan scott", "brian duncan smith", "jon duncan smith", "innes duncan smith"
"a duncan smith" » "a duncan sarah", "a duncan scott", "ra duncan smith", "j duncan smith", "m duncan smith"
"_ duncan smith" » "_ duncan sarah", "_ duncan scott", "_ dunciad smith"
"_ duncan sir" » "_ duncan i", "_ duncan sarah", "_ dunciad sir"

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