Perhaps you should try some spelling variations:
massiv » massive
massivere » massiveere, massiver, massive, massively
massiveere » massiveeere, massiver
passively » massively, passive, passivity
passiveene » passiven, passivierende
passiveand » passiven
passivieren » passivierende, passivierung, passieren
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: ((massiv OR passively) OR ((massivere OR massiveere) OR ((passiveene OR passiveand) OR (passivieren OR aktivierende)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((massiv or passively) or ((massivere OR massiveere) or ((passiveene or passiveand) or (passivieren or aktivierende))))".
• Adding a wildcard symbol may retrieve word variants: ((massiv or passively) or ((massivere OR massiveere) or ((passiveene or passiveand) or (passivieren or aktivierende))))*.