Perhaps you should try some spelling variations:
"brian duncan smith" » "ian duncan smith", "bruce duncan smith", "brian duncan sarah", "brian duncan scott"
"a duncan smith" » "a duncan sarah", "a duncan scott", "ra duncan smith", "_ duncan smith", "j duncan smith"
"a duncan sir" » "a duncan sarah", "ra duncan sir", "_ duncan sir", "j duncan sir"
"a duncan i" » "ra duncan i", "_ duncan i", "j duncan i", "a duncan _", "a duncan m", "a duncan c"

You may be able to get more results by adjusting your search query.

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