Perhaps you should try some spelling variations:
"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)
"coder coder decoder crc protocol" » "coder encoder decoder crc protocol" (Expand search), "coder coder decoder cmac protocol" (Expand search), "coder coder decoder mac protocol" (Expand search), "coder coder decoder opc protocol" (Expand search), "code code decoder crc protocol" (Expand search), "decoder codec decoder crc protocol" (Expand search), "codesc poder decoder crc protocol" (Expand search), "coder coder decoder codec protocol" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder decoder crc protocol\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coder decoder crc protocol ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coder decoder crc protocol") OR ("api python python python programming"))*.