Perhaps you should try some spelling variations:
"coder implementation over routing problem" » "code implementation over routing problem" (Expand search), "decoder implementation over routing problem" (Expand search), "model implementation over routing problem" (Expand search), "coder implementation model routing problem" (Expand search), "coder implementation level routing problem" (Expand search), "coder implementation of routing problem" (Expand search), "coder implementation power routing problem" (Expand search), "coder implementation open routing problem" (Expand search), "coder implementation olsr routing problem" (Expand search)
"python coding python python programming" » "action coding python python programming" (Expand search), "python code python python programming" (Expand search), "python codigo python python programming" (Expand search), "python codigos python python programming" (Expand search), "python using python python programming" (Expand search), "python coding pythons python programming" (Expand search), "python coding piton python programming" (Expand search), "python coding pitons 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 implementation over routing problem") OR ("python coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder implementation over routing problem\") OR (\"python coding python python programming\"))*".
• Removing quotes may allow a broader search: (( coder implementation over routing problem ) OR ( python coding python python programming ))*.