Perhaps you should try some spelling variations:
"jon duncan smith" » "jon duncan sarah", "jon duncan sir", "jon duncan scott", "john duncan smith", "j duncan smith", "ian duncan smith"
"colin duncan smith" » "colin duncan sarah", "colin duncan sir", "colin duncan scott", "john duncan smith"
"_ duncan smith" » "_ duncan sarah", "_ duncan sir", "_ duncan scott", "_ dunciad smith"

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