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 sven" » "john dunton sven", "john dennis sven", "john duncan sven", "john hanning sven", "john dunning john", "john dunning ted"

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 sven") OR ("john jennings sven"))) OR ("john pennings steven")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"john dunning sven\") OR (\"john jennings sven\"))) or (\"john pennings steven\"))".
• Removing quotes may allow a broader search: (((( john dunning sven ) OR ( john jennings sven ))) or ( john pennings steven )).
• Adding a wildcard symbol may retrieve word variants: (((("john dunning sven") OR ("john jennings sven"))) or ("john pennings steven"))*.