Perhaps you should try some spelling variations:
"ra duncan smith" » "ra duncan sir", "_ duncan smith", "mr duncan smith", "j duncan smith", "r_ duncan smith", "rj duncan smith", "rm duncan smith"
"ian duncan sarah" » "ian duncan adam", "ian duncan gray", "ian duncan shaw", "brian duncan sarah", "jon duncan sarah", "innes duncan sarah"
"ian duncan scott" » "ian duncan scotus", "brian duncan scott", "jon duncan scott", "innes duncan scott"
"a duncan scott" » "a duncan scotus", "_ duncan scott", "j duncan scott", "m duncan scott"
"a duncan stone" » "a duncan street", "a duncan jane", "a duncan diane", "_ duncan stone", "j duncan stone", "m duncan stone"

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 ("ian duncan sarah"))) OR ((("ian duncan scott") OR ((("a duncan scott") OR ("a duncan stone")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ra duncan smith\") or (\"ian duncan sarah\"))) or (((\"ian duncan scott\") or (((\"a duncan scott\") OR (\"a duncan stone\"))))))".
• Removing quotes may allow a broader search: (((( ra duncan smith ) or ( ian duncan sarah ))) or ((( ian duncan scott ) or ((( a duncan scott ) OR ( a duncan stone )))))).
• Adding a wildcard symbol may retrieve word variants: (((("ra duncan smith") or ("ian duncan sarah"))) or ((("ian duncan scott") or ((("a duncan scott") OR ("a duncan stone"))))))*.