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