Perhaps you should try some spelling variations:
"teaching computational using diffusion problem" » "using computational using diffusion problem" (Expand search), "teaching educational using diffusion problem" (Expand search), "applying computational using diffusion problem" (Expand search), "teaching computation using diffusion problem" (Expand search), "teaching computations using diffusion problem" (Expand search), "teaching computacional usinas diffusion problem" (Expand search), "teaching computational using diffusion process" (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("teaching computational using diffusion problem") OR ("using codigo python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"teaching computational using diffusion problem\") OR (\"using codigo python python programming\"))*".
• Removing quotes may allow a broader search: (( teaching computational using diffusion problem ) OR ( using codigo python python programming ))*.