Perhaps you should try some spelling variations:
"comicas mathematics computer programa." » "comicas matematicas computer programa.", "copulas mathematical computer programa.", "sciences mathematics computer programa.", "comicas mathematics computer programs.", "comicas mathematics computer program.", "comicas mathematics computer programming."
"basicas matematicas control programming." » "comicas matematicas control programming.", "benditas matematicas control programming.", "fisica matematica control programming.", "basicas matematicas con programming.", "basicas matematicas como programming.", "basicas matematicas entre 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: (("comicas mathematics computer programa.") or ("basicas matematicas control programming."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("comicas mathematics computer programa.") OR ("basicas matematicas control programming.")).
• Removing quotes may allow a broader search: (( comicas mathematics computer programa. ) or ( basicas matematicas control programming. )).
• Adding a wildcard symbol may retrieve word variants: (("comicas mathematics computer programa.") or ("basicas matematicas control programming."))*.