Perhaps you should try some spelling variations:
passiven » passive, passion
passivenener » passiveener, passionener, passivierender, passiverer
massiv » massive
passiverwerb » passiverer
passivere » passiverer, passiver, massivere

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 massiv) OR (passivenener OR passiverwerb)) OR passivere)*.