Perhaps you should try some spelling variations:
massiv » massive
massiverer » massiveerer, massivere, massierer, passiverer
massiven » massiveen, massive, passiven, massively
passivieren » passivierende, passivierung, passieren

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 (massiverer OR massiven))).
• Adding a wildcard symbol may retrieve word variants: (massiv or (passivieren or (massiverer or massiven)))*.