Perhaps you should try some spelling variations:
"_ duncan scott" » "_ duncan scotus", "_ duncan stone"
"john duncan sir" » "john dunton sir", "john dunning sir", "john duncan i", "john duncan sarah"
"jon duncan sir" » "j duncan sir", "ian duncan sir", "colin 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: (("_ duncan scott") OR ((("jon duncan sir") OR ("john duncan sir")))).
• Removing quotes may allow a broader search: (( _ duncan scott ) or ((( jon duncan sir ) or ( john duncan sir )))).
• Adding a wildcard symbol may retrieve word variants: (("_ duncan scott") or ((("jon duncan sir") or ("john duncan sir"))))*.