Perhaps you should try some spelling variations:
"based impression using integer programming" » "based impression using linear programming" (Expand search), "based expression using integer programming" (Expand search), "based regression using integer programming" (Expand search), "and impression using integer programming" (Expand search), "based compression using integer programming" (Expand search), "based depression using integer programming" (Expand search), "based impression using inter programming" (Expand search), "based impression using internet programming" (Expand search), "based impression using integral programming" (Expand search)
"using python python python programming" » "using pythons python python programming" (Expand search), "using piton python python programming" (Expand search), "using pitons python python programming" (Expand search), "usando python python python programming" (Expand search), "in python python 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: (("based impression using integer programming") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based impression using integer programming\") OR (\"using python python python programming\"))".
• Removing quotes may allow a broader search: (( based impression using integer programming ) OR ( using python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("based impression using integer programming") OR ("using python python python programming"))*.