Perhaps you should try some spelling variations:
passiv » passive, passiver
passiven » passiveen, passiveren, passive, passion
passivierender » passiveierender, passiverierender, passivierende, aktivierender, passivieren
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 massiv) OR passiven) OR passivierender)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv OR massiv) or passiven) or passivierender)*".