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

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• Adding a wildcard symbol may retrieve word variants: (("fisica mathematics computer program.") or ("basicas matematica logica programming."))*.