Perhaps you should try some spelling variations:
"de matematicas computer programa." » "de mathematics computer programa.", "de matematicas como programa.", "de matematicas comics programa.", "de matematicas computer programs.", "de matematicas computer program.", "de matematicas computer programming."
"basicas matematica logic programming." » "basicas matematicas logic programming.", "fisica matematica logic programming.", "comicas matematicas logic programming.", "basicas matematica logica programming.", "basicas mathematics logic programming.", "basicas matematica los programming."

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

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