Perhaps you should try some spelling variations:
"performance optimization python python programming" » "performance prediction python python programming" (Expand search), "performance optimization method python programming" (Expand search), "performance optimization option python programming" (Expand search), "performance optimization methods python programming" (Expand search), "performance optimization pythons python programming" (Expand search), "performance optimization piton python programming" (Expand search), "performance optimization pitons python programming" (Expand search)
"coder solution _ coding program" » "code solution _ coding program" (Expand search), "copper solution _ coding program" (Expand search), "powder solution _ coding program" (Expand search), "coder solution _ cloning program" (Expand search), "coder solution _ loading program" (Expand search), "coder solution _ cooling programs" (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 _ coding program\") OR (\"performance optimization python python programming\"))~".
• Removing quotes may allow a broader search: (( coder solution _ coding program ) OR ( performance optimization python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder solution _ coding program") OR ("performance optimization python python programming"))*.