Perhaps you should try some spelling variations:
"competencias matematicas computer programa." » "competencia matematica computer programa.", "competencias basicas computer programa.", "competencias genericas computer programa.", "competencias matematicas como programa.", "competencias matematicas comics programa.", "competencias matematicas computer programs.", "competencias matematicas computer program.", "competencias matematicas computer programmers."
"basicas mathematics computer programming." » "basicas mathematics computer programs.", "basicas mathematics computer program.", "basicas matematicas computer programming.", "business mathematics computer programming."

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