Perhaps you should try some spelling variations:
"logica mathematics computer programmers." » "logica mathematics computer programming.", "logica mathematics computers programming.", "logica mathematics computer program.", "logica matematica computer programmers.", "logico matematico computer programmers.", "logico matematica computer programmers."
"basicas matematicas computer programs." » "basicas matematicas como programs.", "basicas matematicas comics programs.", "comicas matematicas computer programs.", "benditas matematicas computer programs.", "fisica matematica computer programs.", "basicas matematicas computer programas.", "basicas matematicas computer programa."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("logica mathematics computer programmers.") or ("basicas matematicas computer programs."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("logica mathematics computer programmers.") OR ("basicas matematicas computer programs.")).
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• Adding a wildcard symbol may retrieve word variants: (("logica mathematics computer programmers.") or ("basicas matematicas computer programs."))*.