Perhaps you should try some spelling variations:
"comicas matematicas computer program." » "comicas mathematics computer program.", "comicas matematicas como program.", "comicas matematicas comics program.", "basicas matematicas computer program.", "logica matematica computer program.", "economicos matematicos computer program.", "comicas matematicas computer programs."
"ciencias matematicas computer programming." » "ciencias mathematics computer programming.", "ciencias matematicas como programming.", "ciencias matematicas comics programming.", "benditas matematicas computer programming.", "competencias matematicas computer programming.", "ciencias fisicomatematicas computer programming.", "ciencias matematicas computer programs.", "ciencias matematicas computer programsming."

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