Perhaps you should try some spelling variations:
"and computational in linear programming" » "_ computational in linear programming" (Expand search), "and computational and linear programming" (Expand search), "and computational _ linear programming" (Expand search), "and computational 3d linear programming" (Expand search), "and computational non linear programming" (Expand search), "and computational in line programming" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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: (("and computational in linear programming") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computational in linear programming\") OR (\"using codigo python python programming\"))*".
• Removing quotes may allow a broader search: (( and computational in linear programming ) OR ( using codigo python python programming ))*.