Perhaps you should try some spelling variations:
passiv » passive, massiv
passiven » passiveen, massiven, passive, passion
passiveere » passiveeere, massiveere, passivieren, massivere, passiverer
passiver » passiveer, massiver, passive, passively, passiert
massiver » massive, massiven, massively
aktivierende » aktivierenden, aktivieren, motivierende

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 ((passiveere OR passiver) OR massiver)) OR aktivierende).
• Adding a wildcard symbol may retrieve word variants: (((passiv or passiven) or ((passiveere or passiver) or massiver)) or aktivierende)*.