Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passiveeren » passiveeeren, massiveeren, passiveneeren, passivieren, passieren, passiverer
passivenely » passiveenely, massivenely, passivenenely, passively
massivierung » passivierung, passivierungs, massierung
massiveer » massiver, massive, massively

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 (passiveeren OR massivierung)) OR (passivenely OR massiveer)).
• Adding a wildcard symbol may retrieve word variants: ((passiv or (passiveeren or massivierung)) or (passivenely or massiveer))*.