Perhaps you should try some spelling variations:
"basicas mathematics computer programming." » "basicas mathematics computer programs.", "basicas mathematics computer program.", "basicas matematicas computer programming.", "business mathematics computer programming."
"ciencias matematicas como programming." » "benditas matematicas como programming.", "comicas matematicas como programming.", "competencias matematicas como programming.", "ciencias matematica como programming.", "ciencias matematicas con programming.", "ciencias matematica tomo programming.", "ciencias matematicas control programming.", "ciencias matematicas logic programming.", "ciencias matematicas web programming."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("basicas mathematics computer programming.") or ("ciencias matematicas como programming."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("basicas mathematics computer programming.") OR ("ciencias matematicas como programming.")).
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• Adding a wildcard symbol may retrieve word variants: (("basicas mathematics computer programming.") or ("ciencias matematicas como programming."))*.