Perhaps you should try some spelling variations:
"exactas mathematics computer programming." » "exactas mathematics computer programs.", "exactas mathematics computer program.", "exactas matematicas computer programming.", "arts mathematics computer programming."
"basicas matematicas con programmers." » "comicas matematicas con programmers.", "benditas matematicas con programmers.", "fisica matematica con programmers.", "basicas matematicas en programmers.", "basicas matematica en programmers.", "basicas matematicas y programmers.", "basicas matematicas con programmes.", "basicas matematicas con programme.", "basicas matematicas con programmed."

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

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