Perhaps you should try some spelling variations:
"coder of arduino microcontroller program" » "coder of arduino microcontroller programs" (Expand search), "coder of arduino microcontroller from" (Expand search), "coder of arduino microcontrollers programming" (Expand search), "coder _ arduino microcontroller program" (Expand search), "coder an arduino microcontroller program" (Expand search), "code of arduino microcontroller program" (Expand search), "codes of arduino microcontroller program" (Expand search), "codex of arduino microcontroller program" (Expand search)
"on python python python programming" » "on pythons python python programming" (Expand search), "on piton python python programming" (Expand search), "on pitons python python programming" (Expand search), "in python pythin python programming" (Expand search), "of python pythof python programming" (Expand search), "_ python pyth_ 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 of arduino microcontroller program") OR ("on python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder of arduino microcontroller program\") OR (\"on python python python programming\"))".
• Removing quotes may allow a broader search: (( coder of arduino microcontroller program ) OR ( on python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder of arduino microcontroller program") OR ("on python python python programming"))*.