Perhaps you should try some spelling variations:
"coder precoder scheme teaching problem" » "coder precoder scheme teaching program" (Expand search), "coder precoder scheme teaching profile" (Expand search), "coder precoder scheme teaching programs" (Expand search), "coder precoding scheme teaching problem" (Expand search), "coder precoder school teaching problem" (Expand search), "coder precoder themes teaching problem" (Expand search), "coder precoder home teaching problem" (Expand search), "coder decoder scheme teaching 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 precoder scheme teaching problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder precoder scheme teaching problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder precoder scheme teaching problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder precoder scheme teaching problem") OR ("api python python python programming"))*.