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