Perhaps you should try some spelling variations:
"ciencias sociales investigacion educacion." » "ciencias sociales investigacion educacional.", "ciencias sociales investigacion educativa.", "ciencias sociales investigacion innovacion.", "ciencias social investigacion educacion."
"ciencies socials investigacion accion." » "ciencies social investigacion accion.", "ciencies sociales nvestigacion accion.", "ciencies sociales investigaciones accion.", "ciencies socials investigacion en.", "ciencia social investigacion accion.", "ciencas sociales investigacion accion.", "science social investigacion accion."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("ciencias sociales investigacion educacion.") or ("ciencies socials investigacion accion."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ciencias sociales investigacion educacion.") OR ("ciencies socials investigacion accion.")).
• Removing quotes may allow a broader search: (( ciencias sociales investigacion educacion. ) or ( ciencies socials investigacion accion. )).
• Adding a wildcard symbol may retrieve word variants: (("ciencias sociales investigacion educacion.") or ("ciencies socials investigacion accion."))*.