Perhaps you should try some spelling variations:
passiver » passiven, passively, passiert
passivere » passivene, passivelye, passierte, passiverer, passivieren, passiviert
massiverer » massierer, passiverer, massiver, massiverr, massivelyr
massiven » massive, passiven, massively
massivere » massiver, massive, massively

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: ((passiver OR (passive OR (passivere OR massiverer))) OR (massiven OR massivere)).
• Adding a wildcard symbol may retrieve word variants: ((passiver or (passive or (passivere or massiverer))) or (massiven or massivere))*.