Perhaps you should try some spelling variations:
"fixed expressions using integer programming" » "fixed expressions using linear programming" (Expand search), "and expressions using integer programming" (Expand search), "gene expressions using integer programming" (Expand search), "fixed regression using integer programming" (Expand search), "fixed expression using integer programming" (Expand search), "fixed expressions making integer programming" (Expand search), "fixed expression during integer programming" (Expand search), "fixed expressions using inter programming" (Expand search), "fixed expressions using internet programming" (Expand search), "fixed expressions 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: (("fixed expressions using integer programming") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"fixed expressions using integer programming\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( fixed expressions using integer programming ) OR ( using python python python programming ))*.