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

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 sarah") OR ("colin duncan sir"))))*.
• Removing quotes may allow a broader search: (( ian duncan smith ) or ((( jon duncan sarah ) or ( colin duncan sir ))))*.