Perhaps you should try some spelling variations:
"using computation using diffusion program" » "using computational using diffusion program" (Expand search), "using imputation using diffusion program" (Expand search), "using compilation using diffusion program" (Expand search), "using computations using diffusion program" (Expand search), "using computation in diffusion program" (Expand search), "using composition using diffusion program" (Expand search), "using computation using diffusion problem" (Expand search), "using computation using diffusion problems" (Expand search), "using computation using diffusion process" (Expand search)
"using models python python programming" » "using modulo python python programming" (Expand search), "using modeling vpython python programming" (Expand search), "using models pythons python programming" (Expand search), "using models piton python programming" (Expand search), "using models pitons python programming" (Expand search), "ising models python python programming" (Expand search), "using model python python programming" (Expand search), "nursing models 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 computation using diffusion program\") OR (\"using models python python programming\"))~".
• Removing quotes may allow a broader search: (( using computation using diffusion program ) OR ( using models python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("using computation using diffusion program") OR ("using models python python programming"))*.