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