Perhaps you should try some spelling variations:
ciencias portugal » sciences portugal, science portugal
becas portugal » books portugal, casas portugal
portugal red » portugal en, portugal e, portugal de
portugal y » portugal en
red clacso » de clacso
y clacso » y flacso, de clacso, y clase

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 becas portugal y clacso ) OR ( coleccion ciencias portugal red clacso ))~.
• Adding a wildcard symbol may retrieve word variants: (( coleccion becas portugal y clacso ) or ( coleccion ciencias portugal red clacso ))*.