Perhaps you should try some spelling variations:
"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."
"fisica mathematics computer program." » "fisica matematica computer program.", "fisico matematica computer program.", "fisico matematicas computer program.", "fisica mathematics computer programs."

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