Perhaps you should try some spelling variations:
"and optimization in computer programmers" » "and optimization in computer programs" (Expand search), "and optimization in computer programming" (Expand search), "and optimization in computers programming" (Expand search), "and optimization and computer programmers" (Expand search), "and optimization _ computer programmers" (Expand search), "and optimization in computer programamers" (Expand search)
"enhanced path python computer program" » "enhanced at python computer program" (Expand search), "enhanced pdt python computer program" (Expand search), "enhanced phase python computer program" (Expand search), "enhanced with python computer program" (Expand search), "enhanced gate python computer program" (Expand search), "enhanced pytm python computer program" (Expand search), "enhanced path python computer programa" (Expand search)

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