Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivieren » passiveieren, passivenieren, passiverieren, passivierende, passivierung, passieren
massiven » massive, passiven, massiveen
massiv » massive
massively » massiveely, massive
massivere » massiveere, massiver, massive, passiver
massigeren » massiger, massigen, massierer

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