Perhaps you should try some spelling variations:
"coder decoder single channel coding" » "coder decoder using channel coding" (Expand search), "coder decoder single chain coding" (Expand search), "coder decoder side channel coding" (Expand search), "coder decoder single channel using" (Expand search), "encoder decoder single channel 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), "manim 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 decoder single channel coding") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder single channel coding\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder single channel coding ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder single channel coding") OR ("api python python python programming"))*.