Perhaps you should try some spelling variations:
"jon duncan smith" » "jon duncan sarah", "jon duncan scott", "john duncan smith", "ian duncan smith", "colin duncan smith"
"a duncan smith" » "a duncan sarah", "a duncan scott", "ra duncan smith", "_ duncan smith", "m duncan smith"
"j duncan smith" » "j duncan sarah", "j duncan scott", "_ duncan smith", "mr duncan smith"
"jon duncan sir" » "john duncan sir", "ian duncan sir", "colin duncan sir", "jon duncan i", "jon 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: (((("jon duncan smith") OR ("jon duncan sir"))) OR ((("a duncan smith") OR ("j duncan smith")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"jon duncan smith\") OR (\"jon duncan sir\"))) or (((\"a duncan smith\") or (\"j duncan smith\"))))".
• Removing quotes may allow a broader search: (((( jon duncan smith ) OR ( jon duncan sir ))) or ((( a duncan smith ) or ( j duncan smith )))).
• Adding a wildcard symbol may retrieve word variants: (((("jon duncan smith") OR ("jon duncan sir"))) or ((("a duncan smith") or ("j duncan smith"))))*.