Perhaps you should try some spelling variations:
"coder coding _ microcontrollers arduino" » "coder coding _ microcontroller arduino" (Expand search), "coder coding _ microcontroladores arduino" (Expand search), "coder coding _ microcontrolador arduino" (Expand search), "modern coding _ microcontrollers arduino" (Expand search), "color coding _ microcontrollers arduino" (Expand search), "odor coding _ microcontrollers arduino" (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.

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