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