Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiveeeer » passiveeeeer, massiveeeer, passiveneeeer, passiverwerb
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passiver, passieren
massiveen » massiven, massivement, massivsten

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 (massiveen OR passivieren)) OR (passiveeeer OR passiverer)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (massiveen or passivieren)) or (passiveeeer or passiverer))*.