Perhaps you should try some spelling variations:
"function implementation in routing problem" » "union implementation in routing problem" (Expand search), "functional complementation in routing problem" (Expand search), "definition implementation in routing problem" (Expand search), "function implementation and routing problem" (Expand search), "function implementation of routing problem" (Expand search), "function implementation in routine problem" (Expand search), "function implementation in rooting problem" (Expand search), "function implementation on routing 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: (("function implementation in routing problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"function implementation in routing problem\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( function implementation in routing problem ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("function implementation in routing problem") OR ("using coding python python programming"))*.