Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
passiveeeren » passiveeeeren, passiveneeeren, passivereeeren, passieren, passiverer
massiv » massive
massiven » massiveen, massive, passiven, massively
massiveren » massiveeren, massivere, massigeren, massivement

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