Perhaps you should try some spelling variations:
"coder coder changing tree problem" » "coder cover changing tree problem" (Expand search), "coder under changing tree problem" (Expand search), "coder color changing tree problem" (Expand search), "coder coder changing trend problem" (Expand search), "coder coder changing trade problem" (Expand search), "coder coder changing the problem" (Expand search), "coder decoder changing tree problem" (Expand search), "code code changing tree problem" (Expand search), "decoder codec changing tree problem" (Expand search)
"manim python python python programming" » "manim pythons python python programming" (Expand search), "manim piton python python programming" (Expand search), "manim pitons python python programming" (Expand search), "monty 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 changing tree problem") OR ("manim python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder changing tree problem\") OR (\"manim python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder changing tree problem ) OR ( manim python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder changing tree problem") OR ("manim python python python programming"))*.