Perhaps you should try some spelling variations:
"coder allocation and modelling problem" » "coder allocation and modelling problems" (Expand search), "coder allocation and modeling problems" (Expand search), "coder allocation and covering problem" (Expand search), "power allocation and modelling problem" (Expand search), "order allocation and modelling problem" (Expand search), "over allocation and modelling problem" (Expand search), "coder allocation in modelling problem" (Expand search), "coder allocation of modelling problem" (Expand search), "coder allocation and modeling 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 and modelling problem\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder allocation and modelling problem ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder allocation and modelling problem") OR ("api python python python programming"))*.