Perhaps you should try some spelling variations:
"coder coder and challenges problem" » "coder coder and challenging problem" (Expand search), "coder coder and challenges profile" (Expand search), "coder coder and challenges promises" (Expand search), "coder decoder and challenges problem" (Expand search), "code code and challenges problem" (Expand search), "decoder codec and challenges problem" (Expand search), "coder code and challenges problem" (Expand search), "coder codes and challenges problem" (Expand search), "coder poder and challenges problem" (Expand search)
"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)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder and challenges problem\") OR (\"in python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder and challenges problem ) OR ( in python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder and challenges problem") OR ("in python python python programming"))*.