Perhaps you should try some spelling variations:
"comicas mathematics computer programming." » "comicas mathematics computer programs.", "comicas mathematics computer program.", "comicas matematicas computer programming.", "copulas mathematical computer programming.", "sciences mathematics computer programming."
"basicas matematicas con programa." » "comicas matematicas con programa.", "benditas matematicas con programa.", "fisica matematica con programa.", "basicas matematicas en programa.", "basicas matematica en programa.", "basicas matematicas y programa.", "basicas matematicas como programa.", "basicas matematicas un programa.", "basicas matematicas do programa."

Try widening your search to All Fields.

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