Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passivenener » passiveenener, massivenener, passiverenener, passivierender, passiverer, passiveener, passionener
passiverwerb » passiveerwerb, massiverwerb, passivererwerb, passiverer
passiven » passiveen, massiven, passiveren, passive, passion

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: ((passiv OR (passivenener OR passiverwerb)) OR passiven)*.