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