Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveen » passiveeen, massiveen, passiveneen, passiven, passivieren, passiveand
passiveeren » passiveeeren, massiveeren, passiveneeren, passivieren, passieren, passivierende
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
massiven » massive, passiven, massiv
massively » 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 (massiven OR passiveen)) OR (massively OR (passiveeren OR passiverer))).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (massiven or passiveen)) or (massively or (passiveeren or passiverer)))*.