Perhaps you should try some spelling variations:
"based computational in computer program" » "and computational in computer program" (Expand search), "by computational in computer program" (Expand search), "based computational _ computer program" (Expand search), "based computational 3d computer program" (Expand search), "based computational aids computer program" (Expand search)
"using computational and coding program" » "and computational and coding program" (Expand search), "using computational fluid coding program" (Expand search), "using computational and cloning program" (Expand search), "using computational and loading program" (Expand search), "using computational and cooling programs" (Expand search), "using computational and coping program" (Expand search), "using computational and cooling program" (Expand search), "using computational and cooking program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational and coding program\") OR (\"based computational in computer program\"))~".
• Removing quotes may allow a broader search: (( using computational and coding program ) OR ( based computational in computer program ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational and coding program") OR ("based computational in computer program"))*.