Perhaps you should try some spelling variations:
"using computational using linear programming" » "and computational using linear programming" (Expand search), "using computation using linear programming" (Expand search), "using computations using linear programming" (Expand search), "using computacional usinas linear programming" (Expand search)
"using open python python programming" » "using open pythons python programming" (Expand search), "using open piton python programming" (Expand search), "using open pitons python programming" (Expand search), "using opencv python python programming" (Expand search), "using on 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: (("using computational using linear programming") OR ("using open python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational using linear programming\") OR (\"using open python python programming\"))".
• Removing quotes may allow a broader search: (( using computational using linear programming ) OR ( using open python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using computational using linear programming") OR ("using open python python programming"))*.