Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passivieren » passiveieren, massivieren, passiverieren, passivierende, passivierung, passieren
passiveeeren » passiveeeeren, massiveeeren, passivereeeren, passieren, passiverer
massiveren » massivere, massigeren, massiven

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