Perhaps you should try some spelling variations:
"coder coder sample stacking problem" » "coder coder sample packing problem" (Expand search), "coder coder sample packing problems" (Expand search), "coder coder sample teaching problem" (Expand search), "coder modern sample stacking problem" (Expand search), "coder cover samples stacking problem" (Expand search), "coder code samples stacking problem" (Expand search), "coder decoder sample stacking problem" (Expand search), "code code sample stacking problem" (Expand search), "decoder codec sample stacking 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 sample stacking problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder sample stacking problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder sample stacking problem ) OR ( api python python python programming ))*.