Perhaps you should try some spelling variations:
passiv » massiv, passiven
passiver » massiver, passivener, passiven, passively, passiert
passive » massive, passivene
passivere » massivere, passivenere, passivene, passivelye, passierte, passiverer, passivieren

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