Perhaps you should try some spelling variations:
"valor adaptativo al loa superior." » "valor optativo al loa superior.", "valor educativo al loa superior.", "valor citativo al loa superior.", "valor adaptativo para loa superior.", "valor adaptativa del loa superior.", "valor adaptacion al loa superior.", "valor adaptativo al _ superior.", "valor adaptativo al y superior.", "valor adaptativo al la superior.", "valor adaptativo al los superior.", "valor adaptativo alto loa superior."
"valores normativos de grado superior." » "valores formativos de grado superior.", "valores normativo de grado superior.", "valores informativos de grado superior."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("valores normativos de grado superior.") or ("valor adaptativo al loa superior."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("valores normativos de grado superior.") OR ("valor adaptativo al loa superior.")).
• Removing quotes may allow a broader search: (( valores normativos de grado superior. ) or ( valor adaptativo al loa superior. )).
• Adding a wildcard symbol may retrieve word variants: (("valores normativos de grado superior.") or ("valor adaptativo al loa superior."))*.