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

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