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 in python python programming" » "using in pythons python programming" (Expand search), "using in piton python programming" (Expand search), "using in pitons python programming" (Expand search), "using _ 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 in python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computational in linear programming\") OR (\"using in python python programming\"))".
• Removing quotes may allow a broader search: (( and computational in linear programming ) OR ( using in python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("and computational in linear programming") OR ("using in python python programming"))*.