Perhaps you should try some spelling variations:
passiv » massiv, passiver
passiven » massiven, passiveren, passion
passive » massive, passivere
passivieren » massivieren, passiverieren, passivierende, passivierung, passieren
passiveeeer » massiveeeer, passivereeeer, passiverer, passiverwerb
massiverer » massivere, massierer, passiverer

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 ((passiven OR passive) OR passivieren)) OR (passiveeeer OR massiverer)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or ((passiven or passive) or passivieren)) or (passiveeeer or massiverer))*.