Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
passiverere » passivenerere, passivererere, passiverer, passiverwerb, passivierbare
passivierende » passivenierende, passiverierende, passivierender, passivieren, aktivierende
massivere » massiver, massive, massively, massiveere
massiv » 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 ((passive OR (passiverere OR massivere)) OR passivierende)) OR massiv).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passive or (passiverere or massivere)) or passivierende)) or massiv)*.