Perhaps you should try some spelling variations:
"coder coding atmega328 microcontroller programming" » "coder coding atmega328 microcontrollers programming" (Expand search), "coder coding atmega328 microcontroller programs" (Expand search), "coder coding atmega328 microcontroleurs programmation" (Expand search), "modern coding atmega328 microcontroller programming" (Expand search), "color coding atmega328 microcontroller programming" (Expand search), "odor coding atmega328 microcontroller programming" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons 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 coding atmega328 microcontroller programming\") OR (\"_ python python python programming\"))~".
• Removing quotes may allow a broader search: (( coder coding atmega328 microcontroller programming ) OR ( _ python python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder coding atmega328 microcontroller programming") OR ("_ python python python programming"))*.