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