Perhaps you should try some spelling variations:
"exactas matematicas computer programa." » "exactas mathematics computer programa.", "exactas matematicas como programa.", "exactas matematicas comics programa.", "exactas matematicas computer programs.", "exactas matematicas computer program.", "exactas matematicas computer programming."
"basicas matematicas units programming." » "comicas matematicas units programming.", "benditas matematicas units programming.", "fisica matematica units programming.", "basicas matematicas judith programming.", "basicas matematicas una programming.", "basicas matematicas un programming."

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

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