Perhaps you should try some spelling variations:
"performance optimization in coding problem" » "performance prediction in coding problem" (Expand search), "performance optimization and coding problem" (Expand search), "performance optimization _ coding problem" (Expand search), "performance optimization in coding problems" (Expand search), "performance optimization in coping problem" (Expand search), "performance optimization in loading problem" (Expand search), "performance optimization in decoding problem" (Expand search), "performance optimization non coding problem" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (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: (("performance optimization in coding problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"performance optimization in coding problem\") OR (\"using coding python python programming\"))*".
• Removing quotes may allow a broader search: (( performance optimization in coding problem ) OR ( using coding python python programming ))*.