Perhaps you should try some spelling variations:
"advance computation in diffusion problem" » "advance computational in diffusion problem" (Expand search), "advanced computations in diffusion problem" (Expand search), "advanced computational in diffusion problem" (Expand search), "advance computation in diffusion process" (Expand search), "advance computation and diffusion problem" (Expand search), "advance computation of diffusion problem" (Expand search), "advance imputation in diffusion problem" (Expand search), "advance computation on diffusion problem" (Expand search), "advance computation _ diffusion problem" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking 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: (("advance computation in diffusion problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"advance computation in diffusion problem\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( advance computation in diffusion problem ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("advance computation in diffusion problem") OR ("using coding python python programming"))*.