Perhaps you should try some spelling variations:
massiv » massive
massivere » massiveere, massiver, massive, massively
passively » massively, passive, passivity
passiveene » passiven
passiveand » passiven
passivierende » passivierender, passivieren, aktivierende
aktivieren » aktivierung, motivieren

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 (passivierende OR aktivieren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((massiv or passively) or (massivere or ((passiveene OR passiveand) or (passivierende or aktivieren))))".
• Adding a wildcard symbol may retrieve word variants: ((massiv or passively) or (massivere or ((passiveene OR passiveand) or (passivierende or aktivieren))))*.