Perhaps you should try some spelling variations:
"a duncan sarah" » "a duncan adam", "a duncan gray", "a duncan shaw", "ra duncan sarah", "_ duncan sarah", "j duncan sarah"
"bruce duncan smith" » "bruce duncan scott"
"bruce duncan sir" » "bruce duncan i"

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 sarah") OR ((("bruce duncan smith") OR ("bruce duncan sir")))).
• Removing quotes may allow a broader search: (( a duncan sarah ) or ((( bruce duncan smith ) or ( bruce duncan sir )))).
• Adding a wildcard symbol may retrieve word variants: (("a duncan sarah") or ((("bruce duncan smith") or ("bruce duncan sir"))))*.