Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveeren » passiveeeren, massiveeren, passivereeren, passivieren, passieren, passivierung
passivierende » passiveierende, massivierende, passiverierende, passivierender, passivieren, aktivierende
passiverer » passiveerer, massiverer, passivererer, passiverwerb, passivieren, passiver
massiveen » massiven, massivement, massivsten
massively » massive
massiveeren » massivere, passivieren, massigeren

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