Perhaps you should try some spelling variations:
"basicas mathematics computer program." » "basicas matematicas computer program.", "business mathematics computer program.", "basicas mathematics computer programs."
"basicas matematica tomo programas." » "basicas matematicas tomo programas.", "fisica matematica tomo programas.", "comicas matematicas tomo programas.", "basicas matematica como programas.", "basicas matematicas como programas.", "basicas matematica como programa.", "basicas matematica como programar.", "basicas matematica tanto programas."

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 program.") or ("basicas matematica tomo programas."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("basicas mathematics computer program.") OR ("basicas matematica tomo programas.")).
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• Adding a wildcard symbol may retrieve word variants: (("basicas mathematics computer program.") or ("basicas matematica tomo programas."))*.