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

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