Perhaps you should try some spelling variations:
"variance optimization python computer program" » "surface optimization python computer program" (Expand search), "engine optimization python computer program" (Expand search), "value optimization python computer program" (Expand search), "variance optimization method computer program" (Expand search), "variance optimization option computer program" (Expand search), "variance optimization methods computer program" (Expand search)
"based virtualization by coding program" » "based visualization by coding program" (Expand search), "and virtualization by coding program" (Expand search), "the virtualization by coding program" (Expand search), "based virtualization of coding program" (Expand search), "based virtualization in coding program" (Expand search), "based virtualization _ coding program" (Expand search), "based virtualization by cloning program" (Expand search), "based virtualization by loading program" (Expand search), "based virtualization by cooling programs" (Expand search), "based virtualization by codoping program" (Expand search), "based virtualization by cooling program" (Expand search), "based virtualization by coating program" (Expand search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("based virtualization by coding program") OR ("variance optimization python computer program"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based virtualization by coding program\") OR (\"variance optimization python computer program\"))*".
• Removing quotes may allow a broader search: (( based virtualization by coding program ) OR ( variance optimization python computer program ))*.