Perhaps you should try some spelling variations:
"coder coder chen landing problem" » "coder coder chen planning problem" (Expand search), "coder coder chen loading problem" (Expand search), "coder coder chen bending problem" (Expand search), "coder coder the landing problem" (Expand search), "coder coder chen yanling problem" (Expand search), "coder coder chen yaning problem" (Expand search), "coder decoder chen landing problem" (Expand search), "code code chen landing problem" (Expand search), "decoder codec chen landing 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), "rpa python python python programming" (Expand search), "manim 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 chen landing problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder chen landing problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder chen landing problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder chen landing problem") OR ("api python python python programming"))*.