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