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