Perhaps you should try some spelling variations:
passiv » massiv, passiven
passiver » massiver, passivener, passiven, passively, passiert
passivierende » massivierende, passivenierende, passivierender, aktivierende, passivierung, passivierungde, passierende, passagierende
passivieren » massivieren, passivenieren, passivierung, passieren, passagieren
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 (passivierende OR passivieren)) OR massive) OR passive).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((passiv or passiver) or (passivierende OR passivieren)) or massive) or passive)".
• Adding a wildcard symbol may retrieve word variants: ((((passiv or passiver) or (passivierende OR passivieren)) or massive) or passive)*.