Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivene » passiveene, massivene, passivenene, passiven, passiveand, passiverer
passivierung » passiveierung, massivierung, passivenierung, aktivierung
passierende » passerende, passivierende, grassierende
massiverer » massivere, massierer, passiverer

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 ((passivene OR (passierende OR passivierung)) OR massiverer)).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivene or (passierende or passivierung)) or massiverer))*.