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)
"based coding audio coding program" » "based coding audio cloning program" (Expand search), "based coding audio loading program" (Expand search), "based coding audio cooling programs" (Expand search), "based costing audio coding program" (Expand search), "based coating audio coding program" (Expand search), "based coatings audio coding program" (Expand search), "based coding and coding program" (Expand search), "based using audio coding program" (Expand search), "based coding anti coding program" (Expand search), "based coding audio recording program" (Expand search), "based coding video coding 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: (("based coding audio coding program") OR ("variance optimization python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based coding audio coding program\") OR (\"variance optimization python python programming\"))".
• Removing quotes may allow a broader search: (( based coding audio coding program ) OR ( variance optimization python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("based coding audio coding program") OR ("variance optimization python python programming"))*.