Perhaps you should try some spelling variations:
"ciencia tecnologia investigacion accion." » "ciencia etnologia investigacion accion.", "ciencia biotecnologia investigacion accion.", "ciencia technologica investigation accion.", "ciencia tecnologia investigacion en.", "ciencias biotecnologia investigacion accion."
"ciencias sociales investigacion accion." » "ciencias sociales investigacion en.", "ciencias 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 accion.") or ("ciencia tecnologia investigacion accion."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ciencias sociales investigacion accion.") OR ("ciencia tecnologia investigacion accion.")).
• Removing quotes may allow a broader search: (( ciencias sociales investigacion accion. ) or ( ciencia tecnologia investigacion accion. )).
• Adding a wildcard symbol may retrieve word variants: (("ciencias sociales investigacion accion.") or ("ciencia tecnologia investigacion accion."))*.