Perhaps you should try some spelling variations:
passiv » passive, passiven, passiver
passivenener » passiveenener, passivenenener, passiverenener, passivierender, passiverer
passiverwerb » passiveerwerb, passivenerwerb, passivererwerb, passiverer
passivere » passiveere, passivenere, passiverere, passiverer, passiver, massivere
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 (passivenener OR passiverwerb)) OR passivere)*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((passiv OR massiv) or (passivenener or passiverwerb)) or passivere)*".