Perhaps you should try some spelling variations:
"ian duncan scott" » "ian duncan scotus", "a duncan scott", "jon duncan scott", "innes duncan scott"
"ian duncan stone" » "ian duncan street", "ian duncan jane", "ian duncan diane", "a duncan stone", "jon duncan stone", "innes duncan stone"
"brian duncan smith" » "bruce duncan smith", "brian duncan sarah", "bra duncan smith", "brjon duncan smith", "brinnes duncan smith"
"ian duncan sir" » "a 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: (((("ian duncan sir") OR ((("ian duncan scott") OR ("ian duncan stone"))))) OR ("brian duncan smith")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ian duncan sir\") or (((\"ian duncan scott\") OR (\"ian duncan stone\"))))) or (\"brian duncan smith\"))".
• Removing quotes may allow a broader search: (((( ian duncan sir ) or ((( ian duncan scott ) OR ( ian duncan stone ))))) or ( brian duncan smith )).
• Adding a wildcard symbol may retrieve word variants: (((("ian duncan sir") or ((("ian duncan scott") OR ("ian duncan stone"))))) or ("brian duncan smith"))*.