Perhaps you should try some spelling variations:
"john jennings sven" » "john dennis sven", "john jennings ken", "john jennings len", "john jennings karen"
"john pennings steven" » "john iennings steven", "john jenings steven", "john jenkings steven"
"john dunning john" » "john dunton john", "john dennis john", "john duncan john", "john cumming john", "john rowning john"

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 dunning john") OR ("john jennings sven"))) OR ("john pennings steven")).
• Removing quotes may allow a broader search: (((( john dunning john ) or ( john jennings sven ))) or ( john pennings steven )).
• Adding a wildcard symbol may retrieve word variants: (((("john dunning john") or ("john jennings sven"))) or ("john pennings steven"))*.