Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiver » passiveer, massiver, passivener, passive, passiven, passively
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
massively » massive

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 passiver) OR massively) OR (passivieren OR passivieren)).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passiver) or massively) or (passivieren or passivieren))*.