My favorite show have seen recently “Who wants to be a millionaire”. This program have been about Vietnam, buy copyright from the program of the UK. It has been shown on VTV3 on Tuesdays at 21 o'clock. The rules have quited simple, the contestants have to answer quickly and accurately, the best one will been chosen on the hot seat and try himself with the questions that the program offers. With every correct answer, he have achieved a certain milestone. The player have given 4 helpdesks, 50.50, calls to relatives, counseling on the spot, consultation with the audiences. The questions of the program have quiteed interesting, making the audiences so interested. I think this was a very interesting and useful program, it provides us with a wide variety of selective knowledge.
Check grammar help meeeeeeeeeeeeeee

My favorite show that I have seen recently is “Who Wants to Be a Millionaire”. It has been shown on VTV3 on Tuesdays at 21 o'clock. The rules are quite simple, the contestants have to answer quickly and accurately, the best one will be chosen on the hot seat and will try to answer the questions that the program offers. With every correct answer, they achieve a certain milestone. The player is given 4 help desks, a 50/50, calls to relatives, counseling on the spot, and consultation with the audience. The questions on the program are quite interesting, making the audience interested. I think this was a very interesting and useful program, it provides us with a wide variety of selective knowledge.

I don't know what you mean by the 2nd sentence "This program has been about Vietnam, buy copyright from the program of the UK." so I just removed the line but if you want/need to keep it you can add it again but maybe try rewording it.