Perhaps you should try some spelling variations:
letteratura sulla » letteratura russa, letteratura del
de letteratura » e letteratura, di letteratura, de litteratura
e literatura » de literatura, y literatura, e literatur
grund libre » grund lehren
grand libro » gran libro, grand livre
libre de » libro de
i grund » i grunde, i ground
i grand » i grunde
libro e » libro de, libero e, libro i

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: (( i grund libre de letteratura sulla ) OR ( i grand libro e literatura y )).
• Adding a wildcard symbol may retrieve word variants: (( i grund libre de letteratura sulla ) or ( i grand libro e literatura y ))*.