Perhaps you should try some spelling variations:
"coder coder _ singer problem" » "coder coder _ singular problem" (Expand search), "coder coder _ steiner problem" (Expand search), "coder coder _ integer problem" (Expand search), "coder decoder _ singer problem" (Expand search), "code code _ singer problem" (Expand search), "decoder codec _ singer 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 _ singer problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder _ singer problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder _ singer problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder _ singer problem") OR ("api python python python programming"))*.