Perhaps you should try some spelling variations:
"de matematicas computer programmers." » "de matematicas como programmers.", "de matematicas comics programmers.", "de matematicas computer programming.", "de matematicas computers programming.", "de matematicas computer program."
"basicas mathematics computer programs." » "basicas matematicas computer programs.", "business mathematics computer programs.", "basicas mathematics computer programas.", "basicas mathematics computer programa."

Try widening your search to All Fields.

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

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