Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivenere » passiveenere, massivenere, passivenenere, passiverwerb
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passivieren, passiver
massivere » massiver, massive, massively

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 ((massivere OR passivenere) OR (passiverer OR passiverer))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((massivere or passivenere) or (passiverer or passiverer)))*.