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

You may be able to get more results by adjusting your search query.

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