Perhaps you should try some spelling variations:
"basicas matematicas computer programs." » "basicas mathematics computer programs.", "basicas matematicas como programs.", "basicas matematicas comics programs.", "comicas matematicas computer programs.", "benditas matematicas computer programs.", "fisico matematicas computer programs.", "basicas matematicas computer programa."
"fisica matematica comics programas." » "fisica matematicas comics programas.", "fisica matematica como programas.", "fisica matematica logica programas.", "fisica matematica teorias programas.", "fisica matematica los programas.", "fisica matematica como programa."

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