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