Perhaps you should try some spelling variations:
"variance optimization python python programming" » "surface optimization python python programming" (Expand search), "engine optimization python python programming" (Expand search), "value optimization python python programming" (Expand search), "variance optimization method python programming" (Expand search), "variance optimization option python programming" (Expand search), "variance optimization methods python programming" (Expand search), "variance optimization pythons python programming" (Expand search), "variance optimization piton python programming" (Expand search), "variance optimization pitons python programming" (Expand search)
"coder negative effects coding program" » "coder negative affect coding program" (Expand search), "node negative effects coding program" (Expand search), "under negative effects coding program" (Expand search), "order negative effects coding program" (Expand search), "coder negative effects moving program" (Expand search), "coder negative effects according program" (Expand search), "coder negative effects modeling program" (Expand search), "coder negative effects cloning program" (Expand search), "coder negative effects loading program" (Expand search), "coder negative effects cooling programs" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder negative effects coding program") OR ("variance optimization python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder negative effects coding program\") OR (\"variance optimization python python programming\"))".
• Removing quotes may allow a broader search: (( coder negative effects coding program ) OR ( variance optimization python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder negative effects coding program") OR ("variance optimization python python programming"))*.