Perhaps you should try some spelling variations:
passiv » massiv, passiven
passiver » massiver, passivener, passiven, passively, passiert
passiveren » massiveren, passiveneren, passivenen, passivelyen, passierten, passieren, passiverer, passiven
passivieren » massivieren, passivenieren, passivierende, passivierung, passieren
passive » massive, passivene

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