Perhaps you should try some spelling variations:
passiv » massiv, passiven, passiver
passive » massive, passivene, passivere
passivere » massivere, passivenere, passiverere, passiver, passivieren
passiverer » massiverer, passivenerer, passivererer, passiverr, passivierenr, passivieren, passiver, passieren
passiverwerb » massiverwerb, passivenerwerb, passivererwerb

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 passive) OR (passivere OR (passiverer OR passiverwerb)))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((passiv or passive) or (passivere or (passiverer OR passiverwerb)))*".