Perhaps you should try some spelling variations:
"coder coder string matching problems" » "coder coder string matching problem" (Expand search), "coder coder string packing problems" (Expand search), "coder coder string making problems" (Expand search), "coder cordel string matching problems" (Expand search), "coder closed string matching problems" (Expand search), "coder modelo string matching problems" (Expand search), "coder decoder string matching problems" (Expand search), "code code string matching problems" (Expand search), "decoder codec string matching 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 coder string matching problems") OR ("manim python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder string matching problems\") OR (\"manim python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder string matching problems ) OR ( manim python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder string matching problems") OR ("manim python python python programming"))*.