Perhaps you should try some spelling variations:
"sciences mathematics computer programming." » "science mathematics computer programming.", "sequences mathematics computer programming.", "science mathematical computer programming.", "sciences mathematics computer programs.", "sciences mathematics computer program."
"basicas matematicas logic programming." » "comicas matematicas logic programming.", "benditas matematicas logic programming.", "fisica matematica logic programming.", "basicas matematica logica programming.", "basicas mathematics logic programming.", "basicas matematicas comics programming."

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

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