Perhaps you should try some spelling variations:
passiv » massiv, passiven
passive » massive, passivene
passiver » massiver, passivener, passiven, passively, passiert
aktivierende » aktivierenden, aktivieren, motivierende
massiveand » passiveand, massiven

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 ((passive OR (aktivierende OR massiveand)) OR passiver))*.