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)
"basic functions dwt coding program" » "basis functions dwt coding program" (Expand search), "basis function dwt coding program" (Expand search), "base functions dwt coding program" (Expand search), "basic functions dwt cloning program" (Expand search), "basic functions dwt loading program" (Expand search), "basic functions dwt cooling programs" (Expand search), "basic functions data coding program" (Expand search), "basic functions at coding program" (Expand search), "basic functions doi coding program" (Expand search), "basic functions dna 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: (("basic functions dwt coding program") OR ("variance optimization python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"basic functions dwt coding program\") OR (\"variance optimization python python programming\"))".
• Removing quotes may allow a broader search: (( basic functions dwt coding program ) OR ( variance optimization python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("basic functions dwt coding program") OR ("variance optimization python python programming"))*.