Perhaps you should try some spelling variations:
passiv » massiv, passiver
passive » massive, passivere
passiven » massiven, passiveren, passion
passiveeren » massiveeren, passivereeren, passieren, passiverer, passivierende
passivieren » massivieren, passiverieren, 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 passive) OR (passiven OR (massivere OR (passiveeren OR passivieren)))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or passive) or (passiven or (massivere or (passiveeren or passivieren))))*.