Perhaps you should try some spelling variations:
"ciencias mathematics computer programas." » "ciencias matematicas computer programas.", "sciences mathematics computer programas.", "financial mathematics computer programas.", "ciencias mathematics computer programs.", "ciencias mathematics computer program.", "ciencias mathematics computer programmers."
"basicas mathematics logic programming." » "basicas matematicas logic programming.", "business mathematics logic programming.", "basicas matematica logica 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: (("basicas mathematics logic programming.") OR ("ciencias mathematics computer programas."))~.
• Removing quotes may allow a broader search: (( basicas mathematics logic programming. ) or ( ciencias mathematics computer programas. ))~.
• Adding a wildcard symbol may retrieve word variants: (("basicas mathematics logic programming.") or ("ciencias mathematics computer programas."))*.