Perhaps you should try some spelling variations:
massiv » massive
passiveren » passieren, passiverer, passiven
massigeren » massivere, massierer, massigsten, massingeren, massiveen, massieen
massigen » massige, massigung, massie
massiger » massinger, massive, massie
passiveeren » passieren, passiverer, passivierende
passiveeeren » passieren, passiverer
passivieren » passivierende, passivierung, passieren

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: (massiv OR (passiveren OR ((massigeren OR (massigen OR massiger)) OR (passiveeren OR (passiveeeren OR passivieren))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(massiv or (passiveren or ((massigeren or (massigen OR massiger)) or (passiveeren or (passiveeeren or passivieren)))))".
• Adding a wildcard symbol may retrieve word variants: (massiv or (passiveren or ((massigeren or (massigen OR massiger)) or (passiveeren or (passiveeeren or passivieren)))))*.