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."
"comicas matematicas con programa." » "basicas matematicas con programa.", "ciencias matematicas con programa.", "logica matematica con programa.", "comicas matematicas en programa.", "comicas matematica en programa.", "comicas matematicas y programa.", "comicas matematicas como programa.", "comicas matematicas un programa.", "comicas matematicas do programa."

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