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

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