Perhaps you should try some spelling variations:
"using computational code computing model" » "and computational code computing model" (Expand search), "using computational model computing model" (Expand search), "using computational cost computing model" (Expand search), "using computational models computing model" (Expand search), "using computational code competing models" (Expand search), "using computational code computer model" (Expand search), "using computational modern computing model" (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computational code computing model\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( using computational code computing model ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computational code computing model") OR ("using python python python programming"))*.