Perhaps you should try some spelling variations:
passiven » passion
massively » massive
passivieren » passivierung, passieren, passagieren
passivierende » passivierungde, passierende, passagierende, passivierender, aktivierende, passivierung
passiveieren » passionierten, passieren, passivierung
passierenden » passivierenden, grassierenden, basierenden

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: (passive OR ((passiven OR massively) OR (((passivieren OR passivierende) OR passiveieren) OR passierenden)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passive or ((passiven or massively) or (((passivieren OR passivierende) or passiveieren) or passierenden)))*".