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 using modbus protocol" » "coder coder using modis protocol" (Expand search), "coder coder using models protocol" (Expand search), "coder coder using modellus protocol" (Expand search), "coder decoder using modbus protocol" (Expand search), "code code using modbus protocol" (Expand search), "decoder codec using modbus protocol" (Expand search), "coder coders using modbus protocol" (Expand search), "coder cover using modbus protocol" (Expand search), "coder code using modbus protocol" (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 using modbus protocol") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder using modbus protocol\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder using modbus protocol ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder using modbus protocol") OR ("api python python python programming"))*.