Perhaps you should try some spelling variations:
massiv » massive
massiven » massiveen, massive, passiven, massively
passivereren » passivieren, passiverer, passieren
passivierenden » passivierende, passivierender, aktivierenden

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 (massiven OR (passivereren OR passivierenden)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(massiv or (massiven or (passivereren OR passivierenden)))*".