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."
"ensenar matematicas comics programming." » "ensenanza matematicas comics programming.", "ensenar matematicas como programming.", "ensenar mathematics comic programming.", "ensenar matematicas economico programming.", "ensenar matematicas logic programming.", "ensenar matematicas units programming.", "ensenar matematicas computers programming."

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

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