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