Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
estudio del » estudios del, estudio de, studio della
estudios de » estudio de
studio del » studio della, studio delle, estudio de
bist das » ist das, list das, geist das

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: bist das ((studio del) OR (((estudio del) OR (estudios de)))) filosofia ((y literatura) OR (la literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "bist das ((studio del) or (((estudio del) or (estudios de)))) filosofia ((y literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: bist das ((studio del) or (((estudio del) or (estudios de)))) filosofia ((y literatura) OR (la literatura))*.