Perhaps you should try some spelling variations:
di letteratura » della letteratura
de literatura » de litterature, la literatura, y literatura
e letteratura » y literatura, e literatur
grunde libro » grunde fir, grunde gibt, und libro
i grundei » i grund
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 grundei libri ((di letteratura) OR (de literatura)) arti ) OR ( i grunde libro e letteratura e )).
• Adding a wildcard symbol may retrieve word variants: (( i grundei libri ((di letteratura) or (de literatura)) arti ) or ( i grunde libro e letteratura e ))*.