Perhaps you should try some spelling variations:
"richard clarke" » "richard claridge", "richard marke", "richard warde", "richard carewe"
"richard parker" » "richard hooker"
"richard clark" » "richard mark", "richard ward", "richard carew"
"richard ca" » "richard c", "richard cox", "richard ward"

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: (((("richard clark") OR ("richard ca"))) OR ((("richard clarke") OR ("richard parker")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"richard clark\") or (\"richard ca\"))) or (((\"richard clarke\") OR (\"richard parker\"))))".
• Removing quotes may allow a broader search: (((( richard clark ) or ( richard ca ))) or ((( richard clarke ) OR ( richard parker )))).
• Adding a wildcard symbol may retrieve word variants: (((("richard clark") or ("richard ca"))) or ((("richard clarke") OR ("richard parker"))))*.