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