Perhaps you should try some spelling variations:
"coder collaborative and loading problem" » "cddir collaborative and loading problem" (Expand search), "power collaborative and loading problem" (Expand search), "reader collaborative and loading problem" (Expand search), "coder collaborative and routing problem" (Expand search), "coder collaborative and planning problem" (Expand search), "coder collaborative and leading problem" (Expand search), "coder collaborative and unloading 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 collaborative and loading problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder collaborative and loading problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder collaborative and loading problem ) OR ( api python python python programming ))*.