Perhaps you should try some spelling variations:
"and computational and computation program" » "and computational and computational program" (Expand search), "and computational and computational programs" (Expand search), "and computational and compensation program" (Expand search), "_ computational and computation program" (Expand search), "and computational fluid computation program" (Expand search), "of computational of computation program" (Expand search)
"advanced oxidation based coding program" » "advanced oxidation caused coding program" (Expand search), "advanced validation based coding program" (Expand search), "advanced foundation based coding program" (Expand search), "advanced oxidation based cloning program" (Expand search), "advanced oxidation based loading program" (Expand search), "advanced oxidation based cooling programs" (Expand search), "advanced oxidation based costing program" (Expand search), "advanced oxidation based coating program" (Expand search), "advanced oxidation based coatings program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computational and computation program\") OR (\"advanced oxidation based coding program\"))~".
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