Perhaps you should try some spelling variations:
science politicas » science political, science politics, sciences political
coleccion science » coleccion scientia, coleccion ciencia, coleccion ciencis
coleccion claves » coleccion clacso, coleccion casas, coleccion clasicos
claves portugal » chaves portugal, class portugal, casas portugal
politicas en » politicas de
portugal de » portugal e, portugal en, portugal y
en caso » en casos, un caso, en casa

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

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