Perhaps you should try some spelling variations:
passiv » massiv, passiven
passivenene » massivenene, passivenenene, passivierende
passivener » massivener, passivenener, passiverer, passiven, passiverwerb
passive » massive, passivene
passiver » massiver, passivener, passiven, passively, passiert

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 passivenene) OR ((passivener OR passive) OR (passiver OR passivener))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or passivenene) or ((passivener or passive) or (passiver or passivener)))*.