Perhaps you should try some spelling variations:
"coder coder _ microcontroller and" » "coder coder _ microcontroller based" (Expand search), "coder coder _ microcontroller board" (Expand search), "coder coder _ microcontrollers _" (Expand search), "coder decoder _ microcontroller and" (Expand search), "code code _ microcontroller and" (Expand search), "decoder codec _ microcontroller and" (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 _ microcontroller and") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder _ microcontroller and\") OR (\"api python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder coder _ microcontroller and ) OR ( api python python python programming ))*.