Perhaps you should try some spelling variations:
"coleccion sciences political en clase" » "coleccion ciencis political en clase", "coleccion ciencias political en clase", "coleccion ciencia political en clase", "coleccion science political en clase", "coleccion science politics en clase", "coleccion sciences biological en clase", "coleccion sciences politica en clase", "coleccion sciences politicas en clase", "coleccion sciences political _ clase", "coleccion sciences political en clave", "coleccion sciences political la clase", "coleccion sciences political de clase"
"coleccion books portugal dred clacso" » "coleccion becas portugal dred clacso", "coleccion alonso portugal dred clacso", "coleccion books portugal de clacso", "coleccion books portugal en clacso", "coleccion books portugal e clacso", "coleccion books portugal red clacso"

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 sciences political en clase") OR ("coleccion books portugal dred clacso"))~.
• Removing quotes may allow a broader search: (( coleccion sciences political en clase ) or ( coleccion books portugal dred clacso ))~.
• Adding a wildcard symbol may retrieve word variants: (("coleccion sciences political en clase") or ("coleccion books portugal dred clacso"))*.