Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
texts social » tests social, texas social, text social
studio lab » studio a, studio le, studio labore
studio la » studio a, studio le, studio alla

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "texts social ((studio la) OR (studio lab)) filosofia del literatura*".