Perhaps you should try some spelling variations:
"river davon, warwickshire" » "river avon, warwickshire", "rivers avon, warwickshire", "rivers david, warwickshire"
"myers david, warwickshire" » "rogers david, warwickshire"

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: (("river davon, warwickshire") OR ((("myers david, warwickshire") OR ("powers david, warwickshire")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"river davon, warwickshire\") or (((\"myers david, warwickshire\") OR (\"powers david, warwickshire\"))))".
• Removing quotes may allow a broader search: (( river davon, warwickshire ) or ((( myers david, warwickshire ) OR ( powers david, warwickshire )))).
• Adding a wildcard symbol may retrieve word variants: (("river davon, warwickshire") or ((("myers david, warwickshire") OR ("powers david, warwickshire"))))*.