Perhaps you should try some spelling variations:
lan letteratura » alla letteratura, la literatura, e letteratura
literatura fra » literatura oral, letteratura fra, literatura arab
la letteratura » la litterature, la literatura, e letteratura
y literatura » la literatura
grund libro » gran libro, und libro
grunde die » grunde der, grunde des, grundlage die
i grund » i ground, i grand
libro y » libro i, libro _, libro e

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 libro y literatura fra ) OR ( i grunde die ((lan letteratura) OR (la letteratura)) sarda ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grund libro y literatura fra ) or ( i grunde die ((lan letteratura) OR (la letteratura)) sarda ))*".