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, massiv
massively » massive
massiveeren » massivere, massigeren, massivdecken

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 (massively OR ((passiveeren OR massiveeren) OR passivieren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or (passiven or massiven)) or (massively or ((passiveeren OR massiveeren) or passivieren)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passiven or massiven)) or (massively or ((passiveeren OR massiveeren) or passivieren)))*.