Perhaps you should try some spelling variations:
passiven » passive, passion
passivenner » passivener, passionner, klassevenner, passiverwerb
passivene » passivee, passione, passiveand, passive, passively
passiverer » passiverwerb, passivieren, passiver
passiveene » passiveand, passivierende

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: ((passiven OR (passivenner OR passiverer)) OR (passivene OR passiveene))*.