Perhaps you should try some spelling variations:
"ciencias mathematics logic programming." » "ciencias matematicas logic programming.", "sciences mathematics logic programming.", "financial mathematics logic programming.", "ciencias matematica logica programming."
"basicas mathematics computer programas." » "basicas matematicas computer programas.", "business mathematics computer programas.", "basicas mathematics computer programs.", "basicas mathematics computer program.", "basicas mathematics computer programmers."

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 logic programming.") OR ("basicas mathematics computer programas."))~.
• Removing quotes may allow a broader search: (( ciencias mathematics logic programming. ) or ( basicas mathematics computer programas. ))~.
• Adding a wildcard symbol may retrieve word variants: (("ciencias mathematics logic programming.") or ("basicas mathematics computer programas."))*.