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