Perhaps you should try some spelling variations:
"modeling computation in computer program" » "modeling computational in computer program" (Expand search), "modeling simulation in computer program" (Expand search), "modeling notation in computer program" (Expand search), "modeling computation and computer program" (Expand search), "modeling computation of computer program" (Expand search), "modeling imputation in computer program" (Expand search), "modeling computation _ computer program" (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: "((\"modeling computation in computer program\") OR (\"using python python python programming\"))~".
• Removing quotes may allow a broader search: (( modeling computation in computer program ) OR ( using python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("modeling computation in computer program") OR ("using python python python programming"))*.