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