Perhaps you should try some spelling variations:
coleccion science » coleccion scientia, coleccion ciencia, coleccion ciencis
coleccion control » coleccion centro, eleccion control, coleccion canto
science portugal » sciences portugal, science political, science popular
control portugal » contada portugal, control tortura, control political
portugal de » portugal e, portugal en, portugal y
portugal et » portugal en, portugal e, portugal y
et caso » el caso, en caso, del caso

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: (( coleccion science portugal de clacso ) OR ( coleccion control portugal et caso ))~.
• Adding a wildcard symbol may retrieve word variants: (( coleccion science portugal de clacso ) or ( coleccion control portugal et caso ))*.