Perhaps you should try some spelling variations:
"coder coder evs rostering problem" » "coder coder evs clustering problem" (Expand search), "coder coder evs routing problem" (Expand search), "coder coder evs covering problem" (Expand search), "coder coder bus rostering problem" (Expand search), "coder decoder evs rostering problem" (Expand search), "code code evs rostering problem" (Expand search), "decoder codec evs rostering 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), "manim 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 evs rostering problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder evs rostering problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder evs rostering problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder evs rostering problem") OR ("api python python python programming"))*.