Perhaps you should try some spelling variations:
"a duncan stone" » "a duncan street", "a duncan jane", "a duncan diane", "_ duncan stone", "j duncan stone", "m duncan stone"
"ian duncan sarah" » "ian duncan adam", "ian duncan gray", "ian duncan sir", "brian duncan sarah", "jon duncan sarah", "innes duncan sarah"
"ra duncan sarah" » "ra duncan adam", "ra duncan gray", "ra duncan sir", "_ duncan sarah", "mr duncan sarah", "j duncan sarah", "r_ duncan sarah", "rj duncan sarah", "rm duncan sarah"
"ian duncan shaw" » "brian duncan shaw", "jon duncan shaw", "innes duncan shaw"

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 stone") OR ((((("ian duncan sarah") OR ("ra duncan sarah"))) OR ("ian duncan shaw")))).
• Removing quotes may allow a broader search: (( a duncan stone ) or ((((( ian duncan sarah ) or ( ra duncan sarah ))) or ( ian duncan shaw )))).
• Adding a wildcard symbol may retrieve word variants: (("a duncan stone") or ((((("ian duncan sarah") or ("ra duncan sarah"))) or ("ian duncan shaw"))))*.