Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
passiven » passiveen, massiven, passiveren, passive, passion
massiveren » massivere, massigeren, massivement
massiveeren » massivere, massigeren, massivdecken

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