Perhaps you should try some spelling variations:
edward clark » edward clarke, edward ward, edward clive
ewan clark » edwin clark, evan clarke
ian clark » iain clark, brian clark, ann clark
a clark » a clarke, _ clark, e clark
rugby » ruby, rigby

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 clark) OR (a clark))) OR (((ewan clark) OR (edward clark)))) (rugby union).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ian clark) OR (a clark))) or (((ewan clark) or (edward clark)))) (rugby union)".
• Adding a wildcard symbol may retrieve word variants: ((((ian clark) OR (a clark))) or (((ewan clark) or (edward clark)))) (rugby union)*.