Perhaps you should try some spelling variations:
"coder decoder coding 21 protocol" » "coder decoder codecs 21 protocol" (Expand search), "coder decoder using 21 protocol" (Expand search), "coder decoder codec 21 protocol" (Expand search), "encoder decoder coding 21 protocol" (Expand search), "coder decoder coding 2 protocol" (Expand search), "coder decoder coding 19 protocol" (Expand search), "coder decoder coding ai protocol" (Expand search), "coder decoder coding av1 protocol" (Expand search), "coder decoder coding _ protocol" (Expand search), "coder decoder coding of protocol" (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 decoder coding 21 protocol") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder decoder coding 21 protocol\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder decoder coding 21 protocol ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder decoder coding 21 protocol") OR ("api python python python programming"))*.