Perhaps you should try some spelling variations:
"ciencias mathematics computer programming." » "ciencias matematicas computer programming.", "sciences mathematics computer programming.", "financial mathematics computer programming.", "ciencias mathematics computer programs.", "ciencias 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.

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