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