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."
"ciencias matematicas en programa." » "benditas matematicas en programa.", "comicas matematicas en programa.", "competencias matematicas en programa.", "ciencias matematicas en programas.", "ciencias matematicas un programa.", "ciencias matematicas el 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 ("ciencias matematicas en programa."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("basicas mathematics computer programming.") OR ("ciencias matematicas en programa.")).
• Removing quotes may allow a broader search: (( basicas mathematics computer programming. ) or ( ciencias matematicas en programa. )).
• Adding a wildcard symbol may retrieve word variants: (("basicas mathematics computer programming.") or ("ciencias matematicas en programa."))*.