Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierende » passiveierende, massivierende, passivenierende, passivierender, passivieren, passivierung
passiveen » passiveeen, massiveen, passiveneen, passiven, passivieren, passiveand
aktivierende » aktivierenden, aktivieren, motivierende
passieren » passiert, passiven

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 (((passivierende OR aktivierende) OR passieren) OR passiveen)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or (((passivierende OR aktivierende) or passieren) or passiveen))".
• Adding a wildcard symbol may retrieve word variants: (passiv or (((passivierende OR aktivierende) or passieren) or passiveen))*.