Perhaps you should try some spelling variations:
"ciencias mathematics computer programming." » "ciencias matematicas computer programming.", "sciences mathematics computer programming.", "financial mathematics computer programming.", "ciencias mathematics computer programs.", "ciencias mathematics computer program."
"basicas matematica tomo program." » "basicas matematicas tomo program.", "fisica matematica tomo program.", "comicas matematicas tomo program.", "basicas matematica como program.", "basicas matematicas como program.", "basicas matematica como programa.", "basicas matematica como programar."

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