Perhaps you should try some spelling variations:
"advanced estimation and computer programas" » "advanced automation and computer programas" (Expand search), "advanced optimization and computer programas" (Expand search), "advanced oxidation and computer programas" (Expand search), "advanced estimation and computer programs" (Expand search), "advanced estimation and computer programmes" (Expand search), "advanced estimation and computer programme" (Expand search), "advanced estimation in computer programas" (Expand search), "advanced estimation of computer programas" (Expand search), "advanced estimation _ computer programas" (Expand search), "advanced estimation and computer programaas" (Expand search)
"and optimization python computer program" » "and optimization method computer program" (Expand search), "and optimization option computer program" (Expand search), "and optimization methods computer program" (Expand search), "and optimization python computer programa" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advanced estimation and computer programas\") OR (\"and optimization python computer program\"))~".
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