Perhaps you should try some spelling variations:
"coder codes and diffusion coding" » "coder codes and diffusion encoding" (Expand search), "coder codes and diffusion bonding" (Expand search), "coder codes and diffusion coating" (Expand search), "color codes and diffusion coding" (Expand search), "order codes and diffusion coding" (Expand search), "code code and diffusion coding" (Expand search), "coder code and diffusion coding" (Expand search), "coder modes and diffusion coding" (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)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("coder codes and diffusion coding") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder codes and diffusion coding\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder codes and diffusion coding ) OR ( api python python python programming ))*.