Perhaps you should try some spelling variations:
"by computational using diffusion problem" » "by computation using diffusion problem" (Expand search), "by computations using diffusion problem" (Expand search), "by computacional usinas diffusion problem" (Expand search), "by computational using diffusion process" (Expand search), "_ computational using diffusion problem" (Expand search), "and computational using diffusion problem" (Expand search)
"using codigo python python programming" » "using codigo pythons python programming" (Expand search), "using codigo piton python programming" (Expand search), "using codigo pitons python programming" (Expand search), "using indigo python python programming" (Expand search), "using coding python python programming" (Expand search), "using codium 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: "((\"by computational using diffusion problem\") OR (\"using codigo python python programming\"))~".
• Removing quotes may allow a broader search: (( by computational using diffusion problem ) OR ( using codigo python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("by computational using diffusion problem") OR ("using codigo python python programming"))*.