Perhaps you should try some spelling variations:
"coder coder functions diffusion problem" » "coder coder friction diffusion problem" (Expand search), "coder coder fractional diffusion problem" (Expand search), "coder coder reaction diffusion problem" (Expand search), "coder coder functions diffusion process" (Expand search), "coder power functions diffusion problem" (Expand search), "coder order functions diffusion problem" (Expand search), "coder colour functions diffusion problem" (Expand search), "coder decoder functions diffusion problem" (Expand search), "code code functions diffusion problem" (Expand search), "decoder codec functions 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 coder functions diffusion problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder functions diffusion problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder functions diffusion problem ) OR ( api python python python programming ))*.