Perhaps you should try some spelling variations:
"richard clarke" » "richard claridge", "richard parker"
"richard clerk" » "richard clark", "richard coleire", "richard coliere"
"richard berk" » "richard burke", "richard beere", "richard berry"

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