Perhaps you should try some spelling variations:
"ian duncan sarah" » "ian duncan gray", "ian duncan shaw", "ian duncan sir", "a duncan sarah", "jon duncan sarah", "innes duncan sarah"
"brian duncan i" » "bruce duncan i", "bra duncan i", "brjon duncan i", "brinnes duncan i", "brian duncan _", "brian duncan m", "brian duncan c"
"ian duncan adam" » "a duncan adam", "jon duncan adam", "innes duncan adam"

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 ("ian duncan adam"))) OR ("brian duncan i")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"ian duncan sarah\") OR (\"ian duncan adam\"))) or (\"brian duncan i\"))".
• Removing quotes may allow a broader search: (((( ian duncan sarah ) OR ( ian duncan adam ))) or ( brian duncan i )).
• Adding a wildcard symbol may retrieve word variants: (((("ian duncan sarah") OR ("ian duncan adam"))) or ("brian duncan i"))*.