Perhaps you should try some spelling variations:
"coder coder discrete placement problem" » "coder coder discrete element problem" (Expand search), "coder coder discrete elements problem" (Expand search), "coder coder screw placement problem" (Expand search), "coder coder discrete management problem" (Expand search), "coder order discrete placement problem" (Expand search), "coder model discrete placement problem" (Expand search), "coder over discrete placement problem" (Expand search), "coder decoder discrete placement problem" (Expand search), "code code discrete placement problem" (Expand search), "decoder codec discrete placement 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 coder discrete placement problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder discrete placement problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder discrete placement problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder discrete placement problem") OR ("api python python python programming"))*.