Perhaps you should try some spelling variations:
"jon duncan smith" » "jon duncan sarah", "jon duncan sir", "j duncan smith", "ian duncan smith", "colin duncan smith"
"jon duncan scott" » "jon duncan scotus", "jon duncan stone", "j duncan scott", "ian duncan scott", "colin duncan scott"
"john duncan scott" » "john duncan scotus", "john duncan stone", "john dunton scott", "john dunning scott"

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