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 diffusing factor coding program" » "coder inducing factor coding program" (Expand search), "coder using factor coding program" (Expand search), "copper diffusion factor coding program" (Expand search), "coder diffusing factor cloning program" (Expand search), "coder diffusing factor loading program" (Expand search), "coder diffusing factor cooling programs" (Expand search), "coder diffusing factors coping program" (Expand search), "coder diffusing vector coding program" (Expand search), "coder diffusing factor loadings program" (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 diffusing factor coding program") OR ("variance optimization python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder diffusing factor coding program\") OR (\"variance optimization python python programming\"))*".
• Removing quotes may allow a broader search: (( coder diffusing factor coding program ) OR ( variance optimization python python programming ))*.