Perhaps you should try some spelling variations:
"coder coding coding channel model" » "coder coding fading channel model" (Expand search), "coder coding cooling channels model" (Expand search), "coder coding fading channels model" (Expand search), "coder coding decoding channel model" (Expand search), "coder coding using channel model" (Expand search), "coder coding canine channel model" (Expand search), "coder coding coding channel modeling" (Expand search), "modern coding coding channel model" (Expand search), "color coding coding channel model" (Expand search), "odor coding coding channel model" (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 coding channel model") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coding coding channel model\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coding coding channel model ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coding coding channel model") OR ("api python python python programming"))*.