Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiver » passiveer, massiver, passivener, passive, passiven, passively
passiveene » passiveeene, massiveene, passiveneene, passiven, passiveand
passivierende » passiveierende, massivierende, passivenierende, passivierender, passivieren, passivierung
massivene » massiven, massive, massively
massivere » massiver, massive, 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 passiver) OR ((massivene OR massivere) OR (passiveene OR (passivierende OR aktivierende)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or passiver) or ((massivene OR massivere) or (passiveene or (passivierende or aktivierende))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or passiver) or ((massivene OR massivere) or (passiveene or (passivierende or aktivierende))))*.