Perhaps you should try some spelling variations:
cuadernos virtual » calderon virtual
coleccion debates » coleccion artes, coleccion becas
debates portugal » delitos portugal, chaves portugal, debate virtual
virtual de » virtuales de
portugal y » portugal en
y clase » la clase, de clase, en clase

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( coleccion cuadernos virtual de clacso ) or ( coleccion debates portugal y clase ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( coleccion cuadernos virtual de clacso ) OR ( coleccion debates portugal y clase )).
• Adding a wildcard symbol may retrieve word variants: (( coleccion cuadernos virtual de clacso ) or ( coleccion debates portugal y clase ))*.