Perhaps you should try some spelling variations:
"coder formulation _ integer programing" » "coder formulation _ integer programming" (Expand search), "coder formulation _ internet programming" (Expand search), "coder formulation _ linear programing" (Expand search), "powder formulation _ integer programing" (Expand search), "model formulation _ integer programing" (Expand search), "order formulation _ integer programing" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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 formulation _ integer programing\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( coder formulation _ integer programing ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder formulation _ integer programing") OR ("using coding python python programming"))*.