Perhaps you should try some spelling variations:
passiv » passive, passiven
passiver » passiveer, passivener, passive, passiven, passively
passivieren » passiveieren, passivenieren, passivierende, passivierung, passagieren
massiv » massive
massiveren » massiveeren, massivere, massigeren, massivement
massiveeren » massiveeeren, massivere, massigeren, massivdecken
passieren » passiert, passiven

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