Perhaps you should try some spelling variations:
"serie integral de competencias." » "serie integral por competencias.", "serie integral las competencias."
serie integrado » norte integrado
"Serie integrado al competencias." » "Serie integrado a competencias.", "Serie integrado las competencias.", "Serie integrado en competencias.", "Serie integrado del competencias.", "Serie integrado de competencias."

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: (("serie integral de competencias.") or ("Serie integrado al competencias."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("serie integral de competencias.") OR ("Serie integrado al competencias.")).
• Removing quotes may allow a broader search: (( serie integral de competencias. ) or ( Serie integrado al competencias. )).
• Adding a wildcard symbol may retrieve word variants: (("serie integral de competencias.") or ("Serie integrado al competencias."))*.