Perhaps you should try some spelling variations:
"basicas mathematics computer programming." » "basicas mathematics computer program.", "basicas matematicas computer programming.", "business mathematics computer programming."
"comicas matematicas computer programs." » "comicas matematicas como programs.", "comicas matematicas comics programs.", "basicas matematicas computer programs.", "ciencias matematicas computer programs.", "logica matematica computer programs.", "comicas matematicas computer programas.", "comicas matematicas computer 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: (("basicas mathematics computer programming.") or ("comicas matematicas computer programs."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("basicas mathematics computer programming.") OR ("comicas matematicas computer programs.")).
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• Adding a wildcard symbol may retrieve word variants: (("basicas mathematics computer programming.") or ("comicas matematicas computer programs."))*.