Perhaps you should try some spelling variations:
"brian duncan smith" » "ian duncan smith", "bruce duncan smith", "brian duncan sarah"
"brian duncan scott" » "ian duncan scott", "bruce duncan scott", "brian duncan scotus", "brian duncan stone"
"john duncan smith" » "john duncan sarah", "john dunton smith", "john dunning smith"
"colin duncan sir" » "colin duncan i", "colin 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 ("brian duncan scott"))) OR ((("colin duncan sir") OR ("john duncan smith")))).
• Removing quotes may allow a broader search: (((( brian duncan smith ) or ( brian duncan scott ))) or ((( colin duncan sir ) or ( john duncan smith )))).
• Adding a wildcard symbol may retrieve word variants: (((("brian duncan smith") or ("brian duncan scott"))) or ((("colin duncan sir") or ("john duncan smith"))))*.