Perhaps you should try some spelling variations:
"coder coder connected tree problem" » "coder under connected tree problem" (Expand search), "coder closed connected tree problem" (Expand search), "coder hyper connected tree problem" (Expand search), "coder coder connected three problem" (Expand search), "coder coder connected extreme problem" (Expand search), "coder coder connected greedy problem" (Expand search), "coder coder connected the problem" (Expand search), "coder decoder connected tree problem" (Expand search), "code code connected tree problem" (Expand search), "decoder codec connected tree problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons 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 connected tree problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder connected tree problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder connected tree problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder connected tree problem") OR ("api python python python programming"))*.