Perhaps you should try some spelling variations:
"using computation in complex program" » "using computational in complex program" (Expand search), "using imputation in complex program" (Expand search), "using compilation in complex program" (Expand search), "using computation in simplex program" (Expand search), "using computation in complex programmes" (Expand search), "using computation in complex prograded" (Expand search), "using computation and complex program" (Expand search), "using computation of complex program" (Expand search)
"using modeling vpython python programming" » "using modeling method python programming" (Expand search), "using model vpython python programming" (Expand search), "using modern vpython python programming" (Expand search), "using models vpython python programming" (Expand search), "using modeling python python programming" (Expand search), "using modeling pythons python programming" (Expand search), "using modeling piton 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: (("using computation in complex program") OR ("using modeling vpython python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"using computation in complex program\") OR (\"using modeling vpython python programming\"))".
• Removing quotes may allow a broader search: (( using computation in complex program ) OR ( using modeling vpython python programming )).
• Adding a wildcard symbol may retrieve word variants: (("using computation in complex program") OR ("using modeling vpython python programming"))*.