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