Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivener » passiveener, massivener, passivenener, passiverer, passiven, passiver
passiveer » passiveeer, massiveer, passiveneer, passiverer, passiver, passiviert
passiveene » passiveeene, massiveene, passiveneene, passiven, passivierende
passiveand » passiveeand, massiveand, passiveneand, passiven
massiver » massive, massiven, passiver

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 ((passivener OR massiver) OR passiveer)) OR (passiveene OR passiveand)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passivener or massiver) or passiveer)) or (passiveene or passiveand))*.