Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveeren » passiveeeren, passiveneeren, passivereeren, passieren, passiverer, passivierende
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiv » massive
massivere » massiveere, 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 massiv) OR (passiveeren OR (massivere OR passivieren))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (passiveeren or (massivere or passivieren)))*.