Perhaps you should try some spelling variations:
passiv » passive
passiver » passiveer, passive, passively, passiert
passiven » passiveen, passive, passion
massiv » massive
massiven » massiveen, massive, massively
massigeren » massiger, massigen, massivere

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