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 solution in root program" » "code solution in root program" (Expand search), "powder solution in root program" (Expand search), "copper solution in root program" (Expand search), "coder solution in room program" (Expand search), "coder solution in robot programs" (Expand search), "coder solution in dropout program" (Expand search), "coder solutions in root program" (Expand search), "coder solution and root program" (Expand search), "coder solution _ root program" (Expand search)

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

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