Perhaps you should try some spelling variations:
passivieren » passivierende, passivierung, passieren
passivenierung » passivierung, passivierungs
massigeren » massigen, massivere, massierer, massingeren, massiveen, massieen
massiger » massinger, massive, massie
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: (passive OR ((passivieren OR passivenierung) OR ((massigeren OR massiger) OR massiveeren))).
• Adding a wildcard symbol may retrieve word variants: (passive or ((passivieren or passivenierung) or ((massigeren or massiger) or massiveeren)))*.