Perhaps you should try some spelling variations:
"coder coder learning tree problem" » "coder codes learning tree problem" (Expand search), "coder modern learning tree problem" (Expand search), "coder model learning tree problem" (Expand search), "coder coder learning three problem" (Expand search), "coder coder learning trree problem" (Expand search), "coder coder learning free problem" (Expand search), "coder coder learning the problem" (Expand search), "coder decoder learning tree problem" (Expand search), "code code learning tree problem" (Expand search), "decoder codec learning tree problem" (Expand search)
"and python python python programming" » "and pythons python python programming" (Expand search), "and piton python python programming" (Expand search), "and pitons python python programming" (Expand search), "in python python python programming" (Expand search), "on python python python programming" (Expand search), "api python 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 coder learning tree problem") OR ("and python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder learning tree problem\") OR (\"and python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder learning tree problem ) OR ( and python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder learning tree problem") OR ("and python python python programming"))*.