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 programa." » "comicas matematicas tomo programa.", "logica matematica tomo programa.", "basicas matematicas tomo programa.", "comicas matematica como programa.", "comicas matematicas como programa.", "comicas matematica como programar.", "comicas matematica tronos programa."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("comicas matematica tomo programa.") or ("fisica matematica computer programa."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comicas matematica tomo programa.") OR ("fisica matematica computer programa.")).
• Removing quotes may allow a broader search: (( comicas matematica tomo programa. ) or ( fisica matematica computer programa. )).
• Adding a wildcard symbol may retrieve word variants: (("comicas matematica tomo programa.") or ("fisica matematica computer programa."))*.