Perhaps you should try some spelling variations:
"phillips kurven" » "phillips kurve", "phillips curve", "phillips curves"
"phillips kevin" » "phillips evan", "phillips fein", "phillips david"
"philip kevin" » "philip keim", "philip keenan", "philip king"

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: (("philip kevin") OR ((("phillips kevin") OR ("phillips kurven")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"philip kevin\") or (((\"phillips kevin\") OR (\"phillips kurven\"))))".
• Removing quotes may allow a broader search: (( philip kevin ) or ((( phillips kevin ) OR ( phillips kurven )))).
• Adding a wildcard symbol may retrieve word variants: (("philip kevin") or ((("phillips kevin") OR ("phillips kurven"))))*.