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."
"ensenar matematicas computer programa." » "ensenar matematicas como programa.", "ensenar matematicas comics programa.", "ensenanza matematicas computer programa.", "ensenar matematicas computer programs.", "ensenar matematicas computer program.", "ensenar matematicas computer programmers."

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