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 control coding using program" » "based control iodine using program" (Expand search), "based control according using program" (Expand search), "based control coatings using program" (Expand search), "based control coding housing program" (Expand search), "based control coding nursing program" (Expand search), "based control coding aging program" (Expand search), "based control loading using program" (Expand search), "based control modeling using program" (Expand search), "based control drying using 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: "((\"based control coding using program\") OR (\"variance optimization python python programming\"))~".
• Removing quotes may allow a broader search: (( based control coding using program ) OR ( variance optimization python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("based control coding using program") OR ("variance optimization python python programming"))*.