Perhaps you should try some spelling variations:
"coder model using integer programming" » "coder model using linear programming" (Expand search), "coder model using inter programming" (Expand search), "coder model using internet programming" (Expand search), "coder model using integral programming" (Expand search), "cover model using integer programming" (Expand search), "decoder model using integer programming" (Expand search), "copper model using integer programming" (Expand search)
"python coding python python programming" » "python codigo python python programming" (Expand search), "action coding python python programming" (Expand search), "python code python python programming" (Expand search), "python codigos python python programming" (Expand search), "python using python python programming" (Expand search), "python coding pythons python programming" (Expand search), "python coding piton python programming" (Expand search), "python coding pitons 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 model using integer programming") OR ("python coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder model using integer programming\") OR (\"python coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder model using integer programming ) OR ( python coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder model using integer programming") OR ("python coding python python programming"))*.