Perhaps you should try some spelling variations:
passiv » passiven, passiver
passive » passivene, passivere
passiverer » passivenerer, passivererer, passiverwerb, passivieren, passiver
passiverere » passivenerere, passivererere, passiverwerbe, passivierene, passivere, passiverwerb, passivierende, passivierbare
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 massiv) OR ((passive OR passiverer) OR passiverere)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((passive or passiverer) or passiverere))*.