Perhaps you should try some spelling variations:
passiv » passive
passiver » passiveer, passive, passively, passiert
passiven » passiveen, passive, passion
passivierende » passiveierende, passivierender, passivieren, aktivierende
massiv » massive

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