Perhaps you should try some spelling variations:
passivere » massivere, passivieren, passiviert, passivene, passivelye, passierte
passiverer » massiverer, passivierenr, passiviertr, passivener, passivelyer, passierter, passiverwerb, passivieren, passieren
passiver » passiven, passively, passiert

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