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 java computer program" » "code solution java computer program" (Expand search), "powder solution java computer program" (Expand search), "copper solution java computer program" (Expand search), "coder solution and computer program" (Expand search), "coder solution an computer program" (Expand search), "coder solution at computer 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 java computer program\") OR (\"variance optimization python python programming\"))~".
• Removing quotes may allow a broader search: (( coder solution java computer program ) OR ( variance optimization python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder solution java computer program") OR ("variance optimization python python programming"))*.