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