Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiveieren » passiveeieren, massiveieren, passiveneieren, passionierten, passivierende, passieren
massiverwerb » passiverwerb, massivere, massierer

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 (passivieren OR passiveieren)) OR (massiverwerb OR passiert))*.