Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
passivere » passivenere, passiverere, passiverer, passiver, massivere
passivierende » passivenierende, passiverierende, passivierender, passivieren, aktivierende

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 ((passive OR (passivere OR massive)) OR passivierende)) OR massiv).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passive or (passivere or massive)) or passivierende)) or massiv)*.