Perhaps you should try some spelling variations:
"basicas matematicas para programas." » "comicas matematicas para programas.", "benditas matematicas para programas.", "fisica matematica para programas.", "basicas matematicas en programas.", "basicas matematicas para problemas.", "basicas matematicas primaria programas."
"business mathematics popular programming." » "business mathematics computer programming.", "business mathematics software programming.", "business mathematics computers 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: (("basicas matematicas para programas.") or ("business mathematics popular programming."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("basicas matematicas para programas.") OR ("business mathematics popular programming.")).
• Removing quotes may allow a broader search: (( basicas matematicas para programas. ) or ( business mathematics popular programming. )).
• Adding a wildcard symbol may retrieve word variants: (("basicas matematicas para programas.") or ("business mathematics popular programming."))*.