Kien thuc cong nghe & giai tri
[citation needed] [citation needed][citation needed] [citation needed] [c̖ít͍̻͔͔̗ḁ̛̫̥͓ͅt͉̭̗͇̩i̲͝o̷ǹ͈̟̟ ̬̪͖̜̫̤͡n̖͉͔̗̺̻e̷̤̥͈͔e̮̭̺͉̣͘ͅde̗̦̻͘d̼̱͝]
