Perhaps you should try some spelling variations:
"coder coder line balancing problem" » "coder coder line planning problem" (Expand search), "coder coder load balancing problem" (Expand search), "coder decoder line balancing problem" (Expand search), "code code line balancing problem" (Expand search), "decoder codec line balancing problem" (Expand search), "coder border line balancing problem" (Expand search), "coder power line balancing problem" (Expand search), "coder code lines balancing 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 line balancing problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder line balancing problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder line balancing problem") OR ("api python python python programming"))*.