Perhaps you should try some spelling variations:
"coder multi objective scheduling problem" » "coder multi reactive scheduling problem" (Expand search), "coder multi preemptive scheduling problem" (Expand search), "coder multi predictive scheduling problem" (Expand search), "border multi objective scheduling problem" (Expand search), "under multi objective scheduling problem" (Expand search), "power multi objective scheduling 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 multi objective scheduling problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder multi objective scheduling problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder multi objective scheduling problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder multi objective scheduling problem") OR ("api python python python programming"))*.