"The tobacco smoke" is not wrong in English but it makes the sentence refer to smoke at some specific time and place. "Tobacco smoke" makes the sentence a general statement in English.
"Khói thuốc lá" = cigarette smoke??? (Not accepted)
The answer "The smoke is very dangerous" is clearly WRONG.
The TV refers to "khói thuốc lá" which is specifically cigarette smoke.
"Tobacco smoke" or "cigarette smoke" should be preferred.