Perhaps you should try some spelling variations:
"jon duncan smith" » "jon duncan sarah", "jon duncan sir", "john duncan smith", "j duncan smith", "ian duncan smith"
"a duncan smith" » "a duncan sarah", "a duncan sir", "ra duncan smith", "_ duncan smith", "j duncan smith"
"a duncan scott" » "a duncan scotus", "a duncan stone", "ra duncan scott", "_ duncan scott", "j duncan scott"

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: (("jon duncan smith") OR ((("a duncan smith") OR ("a duncan scott"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"jon duncan smith\") or (((\"a duncan smith\") OR (\"a duncan scott\"))))*".
• Removing quotes may allow a broader search: (( jon duncan smith ) or ((( a duncan smith ) OR ( a duncan scott ))))*.