Perhaps you should try some spelling variations:
"contencioso administrativas. administracion" » "contencioso administrativa. administracion", "contencioso administrativo. administracion", "ciencias administrativas. administracion"
"ciencias administrativa. administracion" » "ciencias administrativas. administracion", "contencioso administrativa. administracion", "contenciosa administrativa. administracion"

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 administrativa. administracion") or ("contencioso administrativas. administracion"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("ciencias administrativa. administracion") OR ("contencioso administrativas. administracion")).
• Removing quotes may allow a broader search: (( ciencias administrativa. administracion ) or ( contencioso administrativas. administracion )).
• Adding a wildcard symbol may retrieve word variants: (("ciencias administrativa. administracion") or ("contencioso administrativas. administracion"))*.