Perhaps you should try some spelling variations:
"code using arduino microcontroller arduino" » "code using arduino microcontrolador arduino" (Expand search), "made using arduino microcontroller arduino" (Expand search), "coding using arduino microcontroller 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: "((\"code using arduino microcontroller arduino\") OR (\"api python python python programming\"))~".
• Removing quotes may allow a broader search: (( code using arduino microcontroller arduino ) OR ( api python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("code using arduino microcontroller arduino") OR ("api python python python programming"))*.