Perhaps you should try some spelling variations:
"coder coder basic diffusion problem" » "coder coder basic diffusion process" (Expand search), "coder coder bass diffusion problem" (Expand search), "coder coder based diffusion problem" (Expand search), "coder coder bases diffusion problem" (Expand search), "coder decoder basic diffusion problem" (Expand search), "code code basic diffusion problem" (Expand search), "decoder codec basic diffusion problem" (Expand search), "coder model basic diffusion problem" (Expand search), "coder under basic 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 basic diffusion problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder basic diffusion problem\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder basic diffusion problem ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder basic diffusion problem") OR ("api python python python programming"))*.