Perhaps you should try some spelling variations:
"coder function variants optimization problem" » "coder function variance optimization problem" (Expand search), "coder function variable optimization problem" (Expand search), "coder function martins optimization problem" (Expand search), "coder function variants optimization problems" (Expand search), "coder functional variant optimization problem" (Expand search), "coder functional variables optimization problem" (Expand search), "modern function variants optimization problem" (Expand search), "power function variants optimization problem" (Expand search), "over function variants optimization 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: (("coder function variants optimization problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder function variants optimization problem\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder function variants optimization problem ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder function variants optimization problem") OR ("using coding python python programming"))*.