Perhaps you should try some spelling variations:
"ian duncan green" » "ian duncan gideon", "ian duncan grant", "brian duncan green", "jon duncan green", "innes duncan green"
"ian duncan gray" » "ian duncan grant", "ian duncan sarah", "brian duncan gray", "jon duncan gray", "innes duncan gray"
"a duncan gray" » "a duncan grant", "a duncan sarah", "ra duncan gray", "_ duncan gray", "j duncan gray"

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