Perhaps you should try some spelling variations:
"basicas mathematics computer programa." » "basicas matematicas computer programa.", "business mathematics computer programa.", "basicas mathematics computer programs.", "basicas mathematics computer program.", "basicas mathematics computer programming."
"comicas matematicas control programming." » "basicas matematicas control programming.", "ciencias matematicas control programming.", "logica matematica control programming.", "comicas matematicas con programming.", "comicas matematicas como programming.", "comicas matematicas entre programming."

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