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