Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivierende » passiveierende, massivierende, passivenierende, passivierender, passivieren, aktivierende
passivierung » passiveierung, massivierung, passivenierung, aktivierung
massivieren » passivieren, massivere, massivdecken
massigeren » massiger, massigen, massivere
massiveeren » massivere, passivieren, massivdecken

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 (((passivierende OR massivieren) OR passivierung) OR (massigeren OR massiveeren))).
• Adding a wildcard symbol may retrieve word variants: (passiv or (((passivierende or massivieren) or passivierung) or (massigeren or massiveeren)))*.