Perhaps you should try some spelling variations:
"coder precoder scheme counting problems" » "coder precoder scheme routing problems" (Expand search), "coder precoder scheme routing problem" (Expand search), "coder precoder scheme cutting problem" (Expand search), "coder precoding scheme counting problems" (Expand search), "coder decoder scheme counting problems" (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 precoder scheme counting problems") OR ("manim python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder scheme counting problems\") OR (\"manim python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder scheme counting problems ) OR ( manim python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder scheme counting problems") OR ("manim python python python programming"))*.