Perhaps you should try some spelling variations:
"coder an arduino microcontroller based" » "coder an arduino controller based" (Expand search), "coder _ arduino microcontroller based" (Expand search), "code an arduino microcontroller based" (Expand search), "codes an arduino microcontroller based" (Expand search), "poder an arduino microcontroller based" (Expand search)
"python coding python python programming" » "python codigo python python programming" (Expand search), "action coding python python programming" (Expand search), "python code python python programming" (Expand search), "python codigos python python programming" (Expand search), "python using python python programming" (Expand search), "python coding pythons python programming" (Expand search), "python coding piton python programming" (Expand search), "python coding pitons 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 an arduino microcontroller based") OR ("python coding python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder an arduino microcontroller based\") OR (\"python coding python python programming\"))".
• Removing quotes may allow a broader search: (( coder an arduino microcontroller based ) OR ( python coding python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder an arduino microcontroller based") OR ("python coding python python programming"))*.