Perhaps you should try some spelling variations:
passiver » passiven, passively, passiert
passivere » passivene, passivelye, passierte, passiverer, massivere, passivieren
massiven » massive, passiven, massively
massiveren » massivere, massivement, passivieren
massigeren » massiger, massigen, massivere

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 (massiven OR (massiveren OR massigeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiver or (passive or passivere)) or (massiven or (massiveren OR massigeren)))".
• Adding a wildcard symbol may retrieve word variants: ((passiver or (passive or passivere)) or (massiven or (massiveren OR massigeren)))*.