Perhaps you should try some spelling variations:
"logica matematica computer programming." » "logica matematica computer programs.", "logica matematica computer program.", "logica mathematics computer programming.", "fisica matematica computer programming.", "la matematica computer programming."
"basicas matematica tomo programming." » "basicas matematicas tomo programming.", "fisica matematica tomo programming.", "comicas matematicas tomo programming.", "basicas matematica logic programming.", "basicas matematica web programming.", "basicas matematica java programming.", "basicas matematica como programming.", "basicas matematicas como 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: (("logica matematica computer programming.") or ("basicas matematica tomo programming."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("logica matematica computer programming.") OR ("basicas matematica tomo programming.")).
• Removing quotes may allow a broader search: (( logica matematica computer programming. ) or ( basicas matematica tomo programming. )).
• Adding a wildcard symbol may retrieve word variants: (("logica matematica computer programming.") or ("basicas matematica tomo programming."))*.