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

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 un caso"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("coleccion claves portugal de clacso") OR ("coleccion science politicas un caso")).
• Removing quotes may allow a broader search: (( coleccion claves portugal de clacso ) or ( coleccion science politicas un caso )).
• Adding a wildcard symbol may retrieve word variants: (("coleccion claves portugal de clacso") or ("coleccion science politicas un caso"))*.