Perhaps you should try some spelling variations:
"basicas mathematics computers programming." » "basicas mathematics computer programming.", "basicas mathematics popular programming.", "basicas mathematics competitions programming.", "basicas mathematics computer programs.", "basicas mathematics computer program.", "basicas matematicas computers programming.", "business mathematics computers programming."
"logica matematica computer programas." » "logica mathematics computer programas.", "logica matematica computer programs.", "logica matematica computer program.", "logica matematica computer programmers.", "fisica matematica computer programas.", "la matematica computer programas."

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