Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveerwerb » passiveeerwerb, massiveerwerb, passiveneerwerb, passiverwerb
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
massigeren » massiger, massigen, 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: ((passiv OR massigeren) OR (passiveerwerb OR passiverer))*.