Perhaps you should try some spelling variations:
passiv » passive, massiv, passiver
passiven » passiveen, massiven, passiveren, passive, passion
passiveren » passiveeren, massiveren, passivereren, passivieren, passieren, passiverer
passiveeeren » passiveeeeren, massiveeeren, passivereeeren, passivieren, passieren, passiverer
massiveren » massivere, massivement, passivieren
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 ((passiveren OR (massiveren OR massigeren)) OR passiveeeren))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(passiv or (passiven or ((passiveren or (massiveren OR massigeren)) or passiveeeren)))".
• Adding a wildcard symbol may retrieve word variants: (passiv or (passiven or ((passiveren or (massiveren OR massigeren)) or passiveeeren)))*.