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