Perhaps you should try some spelling variations:
"coder coder decoder sample problem" » "coder coder decoder complex problem" (Expand search), "coder coder decoder same problems" (Expand search), "coder encoder decoder sample problem" (Expand search), "code code decoder sample problem" (Expand search), "decoder codec decoder sample problem" (Expand search), "codesc poder decoder 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)

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 decoder sample problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder decoder sample problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder decoder sample problem ) OR ( api python python python programming ))*.