Perhaps you should try some spelling variations:
john jennings » john dennis, john dunning
jennings sven » jennings ken, jennings len, pennings steven
john hanning » john dunning, john harding, john hawkins
john duncan » john dunton, john dunning
duncan sven » duncan sen, duncan ben, duncan over

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: (((( john hanning sven ) OR ( john duncan sven ))) OR ( john jennings sven )).
• Adding a wildcard symbol may retrieve word variants: (((( john hanning sven ) or ( john duncan sven ))) or ( john jennings sven ))*.