Perhaps you should try some spelling variations:
"coder code 16f877 microcontroller arduino" » "coder code 16f877 microcontrolador arduino" (Expand search), "coder code pic16f877a microcontroller arduino" (Expand search), "code code 16f877 microcontroller arduino" (Expand search), "modern code 16f877 microcontroller arduino" (Expand search), "color code 16f877 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder code 16f877 microcontroller arduino") OR ("api python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder code 16f877 microcontroller arduino\") OR (\"api python python python programming\"))".
• Removing quotes may allow a broader search: (( coder code 16f877 microcontroller arduino ) OR ( api python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder code 16f877 microcontroller arduino") OR ("api python python python programming"))*.