Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiviert » passiveiert, massiviert, passiveniert, passioniert, passivieren, passiert
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
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 ((passiviert OR massiver) OR (passiverer OR passiverer))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiviert or massiver) or (passiverer or passiverer)))*.