Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiv » massive
massiveeren » massiveeeren, massivere, massigeren, massivdecken
massigen » massiger, massigung, massig, massigern, massign
massie » massive, massif, massiven
massige » massiger, massig

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 massiv) OR (passivieren OR (massiveeren OR ((massigen OR massie) OR massige)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or (passivieren or (massiveeren or ((massigen OR massie) or massige))))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or (passivieren or (massiveeren or ((massigen OR massie) or massige))))*.