Perhaps you should try some spelling variations:
"fisica matematica computer program." » "fisica mathematics computer program.", "fisica matematica computer programs."
"basicas matematica logica programming." » "basicas matematicas logica programming.", "comicas matematicas logica programming.", "logica matematica logica programming.", "basicas matematica logic programming.", "basicas matematica logica programable.", "basicas matematica basica programming.", "basicas matematica lengua programming.", "basicas matematica guia programming."

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