Perhaps you should try some spelling variations:
"coder allocation methods and problem" » "coder application methods and problem" (Expand search), "coder collocation method and problem" (Expand search), "coder ablation methods and problem" (Expand search), "power allocation methods and problem" (Expand search), "order allocation methods and problem" (Expand search), "over allocation methods and 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 allocation methods and problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder allocation methods and problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder allocation methods and problem") OR ("api python python python programming"))*.