Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passivieren, passieren, passiverer
massiv » massive
massivere » massiveere, massiver, massive, massively
massiger » massinger, massive, massie
massigeren » massingeren, massiveen, massieen, massigen, massierer, massigsten

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