Perhaps you should try some spelling variations:
"modeling notation in loading problem" » "modeling notation in routing problem" (Expand search), "modeling notation in planning problem" (Expand search), "modeling rotation in loading problem" (Expand search), "modeling annotation in loading problem" (Expand search), "modeling mutation in loading problem" (Expand search), "modeling notation in leading problem" (Expand search), "modeling notation ii loading problem" (Expand search), "modeling notation i loading problem" (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: "((\"modeling notation in loading problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( modeling notation in loading problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("modeling notation in loading problem") OR ("using coding python python programming"))*.