Perhaps you should try some spelling variations:
"coder using arduino microcontroller based" » "coder using arduino controller based" (Expand search), "coders using arduino microcontroller based" (Expand search), "cover using arduino microcontroller based" (Expand search), "code using arduino microcontroller based" (Expand search)
"python code python python programming" » "python code pythons python programming" (Expand search), "python code piton python programming" (Expand search), "python code pitons python programming" (Expand search), "python codigo python python programming" (Expand search), "python pacote 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 using arduino microcontroller based\") OR (\"python code python python programming\"))~".
• Removing quotes may allow a broader search: (( coder using arduino microcontroller based ) OR ( python code python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("coder using arduino microcontroller based") OR ("python code python python programming"))*.