Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passieren, passagieren
passivierung » passiveierung, massivierung, passivenierung, aktivierung
massigeren » massiger, massigen, massivere
massiveren » massivere, massivement, massiven
massiveeren » massivere, massivdecken, massivteilen

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