Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveren » passiveeren, massiveren, passiveneren, passieren, passiverer, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
massivere » massiver, massive, massively

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