Perhaps you should try some spelling variations:
"coder coding using diffusion problem" » "coder coding using diffusion process" (Expand search), "modern coding using diffusion problem" (Expand search), "color coding using diffusion problem" (Expand search), "odor coding using diffusion problem" (Expand search), "coder loading using diffusion problem" (Expand search), "coder modeling using diffusion problem" (Expand search), "coder drying using diffusion problem" (Expand search)
"api python python python programming" » "api pythons python python programming" (Expand search), "api piton python python programming" (Expand search), "api pitons python python programming" (Expand search), "rpa python 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 coding using diffusion problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding using diffusion problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding using diffusion problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding using diffusion problem") OR ("api python python python programming"))*.