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