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."
"science mathematical dynamic programming." » "science matematicas dynamic programming.", "science matematica dynamic programming.", "science mathematical dynamics programming.", "science mathematical dinamica programming.", "science mathematical dinamico programming."

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("basicas mathematics computer programming.") OR ("science mathematical dynamic programming.")).
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