Perhaps you should try some spelling variations:
"using computational using optimization problem" » "using computational using optimization problems" (Expand search), "and computational using optimization problem" (Expand search), "using computation using optimization problem" (Expand search), "using computations using optimization problem" (Expand search), "using computacional usinas optimization problem" (Expand search), "using computational time optimization problem" (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: (("using computational using optimization problem") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational using optimization problem\") OR (\"using python python python programming\"))*".
• Removing quotes may allow a broader search: (( using computational using optimization problem ) OR ( using python python python programming ))*.