Perhaps you should try some spelling variations:
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"basicas matematicas computer programming." » "basicas mathematics computer programming.", "basicas matematicas como programming.", "basicas matematicas comics programming.", "basicas matematicas computer programs.", "basicas matematicas computer program.", "comicas matematicas computer programming.", "benditas matematicas computer programming.", "fisica matematica computer programming."

Try widening your search to All Fields.

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