Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierung » passiveierung, massivierung, passivenierung, aktivierung
passiveeeer » passiveeeeer, massiveeeer, passiveneeeer, passiverer, passiverwerb
passiver » passiveer, massiver, passivener, passive, passiven, passively
massiven » massive, passiven, massively

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 (massiven OR passivierung)) OR (passiveeeer OR passiver)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (massiven or passivierung)) or (passiveeeer or passiver))*.