Perhaps you should try some spelling variations:
"coder coder channel modeling problem" » "coder coder channel coding problem" (Expand search), "coder coder channel model problem" (Expand search), "coder coder channel modeling problems" (Expand search), "coder coder channel modelling problem" (Expand search), "coder coder channel modelling problems" (Expand search), "coder codes channel modeling problem" (Expand search), "coder adder channel modeling problem" (Expand search), "coder color channel modeling problem" (Expand search), "coder decoder channel modeling problem" (Expand search), "code code channel modeling problem" (Expand search), "decoder codec channel modeling 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 channel modeling problem") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder channel modeling problem\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder channel modeling problem ) OR ( api python python python programming ))*.