Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivene » passiveene, passivenene, passiverene, passiven, passiveand, passive
passiveeand » passiveeeand, passiveneeand, passivereeand, passiveand
passiverwerb » passiveerwerb, passivenerwerb, passivererwerb
passiverer » passiveerer, passivenerer, passivererer, passivieren, passiver, passieren
massiv » massive

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 massiv) OR ((passivene OR (passivene OR passiveeand)) OR (passiverwerb OR passiverer))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or massiv) or ((passivene or (passivene or passiveeand)) or (passiverwerb OR passiverer)))".
• Adding a wildcard symbol may retrieve word variants: ((passiv or massiv) or ((passivene or (passivene or passiveeand)) or (passiverwerb OR passiverer)))*.