Perhaps you should try some spelling variations:
passiv » passive, massiv
passivierende » passiveierende, massivierende, passivierender, passivieren, aktivierende
passiven » passiveen, massiven, passive
passiver » passiveer, massiver, passive, passively, passiert
passiveer » passiveeer, massiveer, passiverer, passiviert, passive

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