Perhaps you should try some spelling variations:
massiv » massive
massivere » massiveere, massiver, massive, massively
passivieren » passivierung, passieren, passagieren
passivierende » passivierungde, passierende, passagierende, passivierender, aktivierende, passivierung
passiver » passive, passiven, passively

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 ((passivieren OR passivierende) OR (massivere OR passiver)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(massiv or ((passivieren OR passivierende) or (massivere or passiver)))*".