Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveren » passiveeren, massiveren, passiveneren, passieren, passiverer, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiveerer » passiveeerer, massiveerer, passiveneerer, passiverer, passiverwerb

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 (passiveren OR passivieren)) OR passiveerer)*.