Perhaps you should try some spelling variations:
ciencias portugal » sciences portugal, science portugal
coleccion control » coleccion centro, eleccion control, coleccion canto
control portugal » contada portugal, control tortura, control political
portugal e » portugal y
en clacso » red clacso, de clacso, en clase
e caso » el caso, de caso, en 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 ciencias portugal en clacso ) OR ( coleccion control portugal e caso ))~.
• Adding a wildcard symbol may retrieve word variants: (( coleccion ciencias portugal en clacso ) or ( coleccion control portugal e caso ))*.