Perhaps you should try some spelling variations:
"by computational using diffusion program" » "by computation using diffusion program" (Expand search), "by computations using diffusion program" (Expand search), "by computacional usinas diffusion program" (Expand search), "by computational using diffusion problem" (Expand search), "by computational using diffusion problems" (Expand search), "by computational using diffusion process" (Expand search), "_ computational using diffusion program" (Expand search), "and computational using diffusion program" (Expand search)
"using tool python python programming" » "using tool pythons python programming" (Expand search), "using tool piton python programming" (Expand search), "using tool pitons python programming" (Expand search), "using tools python python programming" (Expand search), "using total python python programming" (Expand search), "using tonal python 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: (("by computational using diffusion program") OR ("using tool python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"by computational using diffusion program\") OR (\"using tool python python programming\"))".
• Removing quotes may allow a broader search: (( by computational using diffusion program ) OR ( using tool python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("by computational using diffusion program") OR ("using tool python python programming"))*.