Perhaps you should try some spelling variations:
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"by computational and computing program" » "by computational fluid computing program" (Expand search), "by computational and consulting program" (Expand search), "by computational and computer program" (Expand search), "by computational and computador program" (Expand search), "_ computational and computing program" (Expand search), "and computational and computing program" (Expand search), "by computational grid computing program" (Expand search), "by computational fog computing program" (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"by computational and computing program\") OR (\"dft calculation and computation program\"))~".
• Removing quotes may allow a broader search: (( by computational and computing program ) OR ( dft calculation and computation program ))~.
• Adding a wildcard symbol may retrieve word variants: (("by computational and computing program") OR ("dft calculation and computation program"))*.