Perhaps you should try some spelling variations:
passiv » passiver
passiven » passiveren, passion
passivierende » passiverierende, passivierender, passivieren, aktivierende
passive » passivere
massiv » 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 passiven) OR passivierende) OR massiv) OR passive).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((passiv OR passiven) or passivierende) or massiv) or passive)".
• Adding a wildcard symbol may retrieve word variants: ((((passiv OR passiven) or passivierende) or massiv) or passive)*.