Perhaps you should try some spelling variations:
"ian duncan sarah" » "ian duncan adam", "ian duncan gray", "ian duncan shaw", "brian duncan sarah", "jon duncan sarah", "innes duncan sarah"
"a duncan sarah" » "a duncan adam", "a duncan gray", "a duncan shaw", "ra duncan sarah", "_ duncan sarah", "j duncan sarah"
"mr dundas smith" » "mr douglas smith", "mr und smith", "mr das smith", "mr dundas's 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: (((("ian duncan sarah") OR ("a duncan sarah"))) OR ("mr dundas smith")).
• Removing quotes may allow a broader search: (((( ian duncan sarah ) or ( a duncan sarah ))) or ( mr dundas smith )).
• Adding a wildcard symbol may retrieve word variants: (((("ian duncan sarah") or ("a duncan sarah"))) or ("mr dundas smith"))*.