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

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