Perhaps you should try some spelling variations:
"competencias matematicas como programming." » "competencia matematica como programming.", "competencias basicas como programming.", "competencias genericas como programming.", "competencias matematica como programming.", "competencias matematicas con programming.", "competencias matematica tomo programming.", "competencias matematicas control programming.", "competencias matematicas logic programming.", "competencias matematicas computer programming."
"basicas matematicas computer program." » "basicas mathematics computer program.", "basicas matematicas comics program.", "comicas matematicas computer program.", "benditas matematicas computer program.", "fisica matematica computer program.", "basicas matematicas computer programs."

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