Perhaps you should try some spelling variations:
"coder poder _ microcontroller arduino" » "coder poder _ microcontrolador arduino" (Expand search), "poder poder _ microcontroller arduino" (Expand search), "codesc poder _ microcontroller arduino" (Expand search), "poder power _ microcontroller arduino" (Expand search)
"in python python python programming" » "in pythons python python programming" (Expand search), "in piton python python programming" (Expand search), "in pitons python python programming" (Expand search), "_ 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 poder _ microcontroller arduino") OR ("in python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder poder _ microcontroller arduino\") OR (\"in python python python programming\"))*".
• Removing quotes may allow a broader search: (( coder poder _ microcontroller arduino ) OR ( in python python python programming ))*.