Perhaps you should try some spelling variations:
"coder coder worker allocation problem" » "coder coder worker location problem" (Expand search), "coder coder work allocation problem" (Expand search), "coder coder water allocation problem" (Expand search), "coder coder power allocation problem" (Expand search), "coder older worker allocation problem" (Expand search), "coder older workers allocation problem" (Expand search), "coder carers worker allocation problem" (Expand search), "coder decoder worker allocation problem" (Expand search), "code code worker allocation problem" (Expand search), "decoder codec worker allocation 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 worker allocation problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder worker allocation problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder worker allocation problem ) OR ( api python python python programming ))*.