Perhaps you should try some spelling variations:
serie integrado » norte integrado
"Serie integrado al competencias." » "Serie integrado a competencias.", "Serie integrado las competencias.", "Serie integrado de competencias.", "Serie integrado del competencias.", "Serie integrado en competencias."
"serie integral por competencias." » "serie integral 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 integrado al competencias.") or ("serie integral por competencias."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("Serie integrado al competencias.") OR ("serie integral por competencias.")).
• Removing quotes may allow a broader search: (( Serie integrado al competencias. ) or ( serie integral por competencias. )).
• Adding a wildcard symbol may retrieve word variants: (("Serie integrado al competencias.") or ("serie integral por competencias."))*.