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