Perhaps you should try some spelling variations:
passiv » passive, passiven
passiver » passiveer, passivener, passive, passiven, passively
passivener » passiveener, passivenener, passiverer, passiven, passiverwerb
massiv » massive
massiveen » massiveeen, massiven, massivement, massivsten
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 (passiver OR passivener)) OR massiv) OR (massiveen OR massigeren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or (passiver OR passivener)) or massiv) or (massiveen or massigeren))".
• Adding a wildcard symbol may retrieve word variants: (((passiv or (passiver OR passivener)) or massiv) or (massiveen or massigeren))*.