Perhaps you should try some spelling variations:
"based combination using integer programming" » "based combination using linear programming" (Expand search), "and combination using integer programming" (Expand search), "dose combination using integer programming" (Expand search), "based communication using integer programming" (Expand search), "based compilation using integer programming" (Expand search), "based compensation using integer programming" (Expand search), "based coordination using integer programming" (Expand search), "based combination using inter programming" (Expand search), "based combination using internet programming" (Expand search), "based combination 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 combination using integer programming") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"based combination using integer programming\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( based combination using integer programming ) OR ( using python python python programming ))*.