Perhaps you should try some spelling variations:
"coder coder it challenging problem" » "coder coder it chattering problem" (Expand search), "coder coder it challenging proposal" (Expand search), "coder coder its challenging problem" (Expand search), "coder coder in challenging problem" (Expand search), "coder coder with challenging problem" (Expand search), "coder decoder it challenging problem" (Expand search), "code code it challenging problem" (Expand search), "decoder codec it challenging problem" (Expand search), "coder powder it challenging problem" (Expand search), "coder code its challenging problem" (Expand search), "coder code at challenging 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 it challenging problem") OR ("manim python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder it challenging problem\") OR (\"manim python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder it challenging problem ) OR ( manim python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder it challenging problem") OR ("manim python python python programming"))*.