Perhaps you should try some spelling variations:
"coder functions using diffusion problem" » "coder functions using diffusion process" (Expand search), "power functions using diffusion problem" (Expand search), "order functions using diffusion problem" (Expand search), "colour functions using diffusion problem" (Expand search), "coder function using diffusion problem" (Expand search), "coder reactions 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 functions using diffusion problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder functions using diffusion problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder functions using diffusion problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder functions using diffusion problem") OR ("api python python python programming"))*.