Perhaps you should try some spelling variations:
massiv » massive
massivere » massiveere, massiver, massive, massively
passiverer » passiverwerb, passivieren, passagerer, passiveer, passivener, passivelyer
passieren » passiert, passiven
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 ((passiverer OR passieren) OR (massivere OR passiver)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(massiv or ((passiverer OR passieren) or (massivere or passiver)))*".