Perhaps you should try some spelling variations:
passiv » passive, passiven
passiverer » passiveerer, passivenerer, passiverwerb, passivieren, passieren, passiveer, passivener, passivelyer
passiver » passiveer, passivener, passive, passiven, passively
passivenere » passiveenere, passivenenere, passiverwerb
massiv » massive

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