Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiverwerb » passiveerwerb, massiverwerb, passivenerwerb
passiverer » passiveerer, massiverer, passivenerer, passivieren, passiver, passieren
passiveand » passiveeand, massiveand, passiveneand, passiven

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 (passiverwerb OR passiverer)) OR passiveand)*.