Perhaps you should try some spelling variations:
passiv » passive, massiv, passiven
passivieren » passiveieren, massivieren, passivenieren, passivierende, passivierung, passieren
passivenierung » passiveenierung, massivenierung, passivenenierung, passivierung, passivierungs
massigeren » massiger, massigen, massivere
massie » massive, massiv, massif
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 passivenierung) OR ((massigeren OR massie) OR massiveeren))).
• Adding a wildcard symbol may retrieve word variants: (passiv or ((passivieren or passivenierung) or ((massigeren or massie) or massiveeren)))*.