Perhaps you should try some spelling variations:
passiver » passive, passively, passiert
passiven » passive, passion
passivelyen » passively, passivelyn, massivelyn, passiveln
passivelye » passively, massively, passivel

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: ((passiver OR (passiven OR passivelyen)) OR passivelye).
• Adding a wildcard symbol may retrieve word variants: ((passiver or (passiven or passivelyen)) or passivelye)*.