Perhaps you should try some spelling variations:
passiven » passive, passion
massively » massive
passivierender » aktivierender, passivierungr, passerender, passivierungder, passierender, passagierender
passivierende » aktivierende, passivierung, passerende, passivierungde, passierende, passagierende
passivieren » passivierung, passieren, passagieren

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: ((passiven OR massively) OR (passivierender OR (passivierende OR passivieren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiven or massively) or (passivierender or (passivierende OR passivieren)))".
• Adding a wildcard symbol may retrieve word variants: ((passiven or massively) or (passivierender or (passivierende OR passivieren)))*.