Perhaps you should try some spelling variations:
"by computational in nonlinear programming" » "by computational in linear programming" (Expand search), "_ computational in nonlinear programming" (Expand search), "and computational in nonlinear programming" (Expand search), "by computational and nonlinear programming" (Expand search), "by computational _ nonlinear programming" (Expand search), "by computational 3d 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 in nonlinear programming") OR ("using python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"by computational in nonlinear programming\") OR (\"using python python python programming\"))".
• Removing quotes may allow a broader search: (( by computational in nonlinear programming ) OR ( using python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("by computational in nonlinear programming") OR ("using python python python programming"))*.