Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveen » passiveeen, massiveen, passiveneen, passiven, passiveand, passive
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passiverer » passiveerer, massiverer, passivenerer, passiverwerb, passiver, passieren

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 (passiveen OR passivieren)) OR (massiveeeer OR passiverer)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passiveen or passivieren)) or (massiveeeer or passiverer))*.