Perhaps you should try some spelling variations:
"ian duncan smith" » "ian duncan sarah", "ian duncan sir", "ian duncan scott", "brian duncan smith", "innes duncan smith"
"a duncan smith" » "a duncan sarah", "a duncan sir", "a duncan scott", "ra duncan smith", "_ duncan smith", "j duncan smith"
"jon duncan smith" » "jon duncan sarah", "jon duncan sir", "jon duncan scott", "j duncan smith", "colin duncan smith"
"john duncan smith" » "john duncan sarah", "john duncan sir", "john duncan scott", "john dunton smith", "john dunning smith"

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