Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passiveren » passiveeren, passiveneren, passivereren, passivieren, passieren, passiven
passiverer » passiveerer, passivenerer, passivererer, passiverwerb, passivieren, passiver
passivenere » passiveenere, passivenenere, passiverenere, passiverwerb
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 (passiveren OR passiverer)) OR massiv) OR passivenere).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv or (passiveren OR passiverer)) or massiv) or passivenere)".
• Adding a wildcard symbol may retrieve word variants: (((passiv or (passiveren OR passiverer)) or massiv) or passivenere)*.