Perhaps you should try some spelling variations:
"comicas matematicas como programar." » "basicas matematicas como programar.", "ciencias matematicas como programar.", "logica matematica como programar.", "comicas matematica como programar.", "comicas matematicas con programar.", "comicas matematica tomo programar.", "comicas matematicas como programa.", "comicas matematicas campo programa.", "comicas matematicas con programa."
"business mathematics computer programas." » "business mathematics computer programs.", "business mathematics computer program.", "business mathematics computer programmers."

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