Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierung, passieren, passagieren
passiveieren » passiveeieren, massiveieren, passiveneieren, passionierten, passieren, passivierung
passivierende » passiveierende, massivierende, passivenierende, passivierungde, passierende, passagierende, passivierender, aktivierende, passivierung
massiven » massive, passiven, massiv
massively » 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 ((massiven OR massively) OR ((passivieren OR passiveieren) OR passivierende)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((massiven or massively) or ((passivieren OR passiveieren) or passivierende)))*".