Perhaps you should try some spelling variations:
"coder coder set covering problem" » "coder coder set routing problem" (Expand search), "coder coder set loading problem" (Expand search), "coder coder soil covering problem" (Expand search), "coder decoder set covering problem" (Expand search), "code code set covering problem" (Expand search), "decoder codec set covering problem" (Expand search), "coder code set covering problem" (Expand search), "coder power set covering problem" (Expand search), "coder lower set 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder set covering problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder set covering problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder set covering problem") OR ("api python python python programming"))*.