Perhaps you should try some spelling variations:
"coder application using diffusion problem" » "code application using diffusion problem" (Expand search), "codes application using diffusion problem" (Expand search), "powder application using diffusion problem" (Expand search), "coder applications using diffusion problem" (Expand search), "coder application and diffusion problem" (Expand search), "coder application using diffusion process" (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: (("coder application using diffusion problem") OR ("using coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder application using diffusion problem\") OR (\"using coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder application using diffusion problem ) OR ( using coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder application using diffusion problem") OR ("using coding python python programming"))*.