Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierungr » passiveierungr, massivierungr, passivenierungr, passivierung, passivierungs, passivierender
massiven » massive, passiven, massively
massivieren » passivieren, massivere, massigeren

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 (massiven OR massivieren)) OR passivierungr)*.