Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveeren » passiveeeren, massiveeren, passivereeren, passieren, passiverer, passivierende
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
massiven » massive, massively, massiv
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 ((passiven OR massiven) OR (massivere OR (passiveeren OR passivieren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((passiven OR massiven) or (massivere or (passiveeren or passivieren))))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passiven OR massiven) or (massivere or (passiveeren or passivieren))))*.