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