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