Perhaps you should try some spelling variations:
"basicas mathematics computer programming." » "basicas mathematics computer programs.", "basicas mathematics computer program.", "basicas matematicas computer programming.", "business mathematics computer programming."
"comicas matematicas con programming." » "basicas matematicas con programming.", "ciencias matematicas con programming.", "logica matematica con programming.", "comicas matematicas en programming.", "comicas matematica en programming.", "comicas matematicas y programming.", "comicas matematicas web programming.", "comicas matematicas control programming.", "comicas matematicas logic programming."

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