Perhaps you should try some spelling variations:
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ python python python programming" (Expand search)
"coder coder bin routing problem" » "coder decoder bin routing problem" (Expand search), "code code bin routing problem" (Expand search), "decoder codec bin routing problem" (Expand search), "coder coder line routing problem" (Expand search), "coder coder in routine problem" (Expand search), "coder coder bus routing problem" (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 coder bin routing problem") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder bin routing problem\") OR (\"in python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder bin routing problem ) OR ( in python python python programming ))*.