Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierung, passieren, passagieren
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 passivierende))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or ((massiven or massively) or (passivieren OR passivierende)))".
• Adding a wildcard symbol may retrieve word variants: (passiv or ((massiven or massively) or (passivieren OR passivierende)))*.