Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
massiveren » massivere, massivement, passivieren
massiveeren » massivere, passivieren, massivdecken
massigeren » massiger, massigen, massivere

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