Perhaps you should try some spelling variations:
"fisica matematica computer programming." » "fisica matematica computer programs.", "fisica matematica computer program.", "fisica mathematics computer programming."
"basicas matematicas computer programa." » "basicas mathematics computer programa.", "basicas matematicas como programa.", "basicas matematicas comics programa.", "comicas matematicas computer programa.", "benditas matematicas computer programa.", "fisico matematicas computer programa.", "basicas matematicas computer programs.", "basicas matematicas computer program.", "basicas matematicas computer programmers."

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