(former Vietnam Idol judge), Hoài Sa (season 3 advisor) and Hồ Ngọc Hà (season 1 coach) served as advisors for team Tóc Tiên, Thu Minh and Noo for the Knockouts, respectively. Teams Color key Blind auditions Episode 1 (12 February) Episode 2 (19 February) Episode 3 (26 February) Episode 4 (5 March) The Battles The battle rounds determine which contestant from each team is qualified for the Knockouts. Two (or three) contestants within a team are paired together to sing one song, but only one contestant is chosen for the live shows. There are no "steal" this season, but after the Battles are concluded, each coach can bring back an eliminated contestant from their own team as a coach-comeback artist and compete in the Knockouts. After the Battles, each team will have 6 artists. Color key: The Knockouts This season, the knockouts is brought back after being scrapped in season 3. After the Battle Round, each coach will have 6 contestants for the Knockouts and they will pair 2 artists for a "Knockouts". Each contestant will sing a song of their own choice, and their respective coach will decide the winner of that Knockouts. In addition, each coach is allowed to "steal" one losing contestant from another coach's team. Contestants who either won the Knockouts or being stolen by another coach are qualified for the Live Shows. After the Knockouts, each team will has 4 contestants. Color key: Playoffs Different from the previous 3 seasons, in this season, only the finals show is recorded live, whereas all the playoffs round are pre-recorded. The result are voted on in real-time by audience attending the show in the stadium. The rules are still similar to the past 3 seasons, which one (or two) artists received the most public vote will automatically advance to the next round, the coaches then choose one artist from their team to move on to the next round and the other team member is sent home. In addition, the "Wildcard" twist, which appeared on many Vietnamese shows like The X Factor Vietnam, Sing My Song Vietnam, The Face Vietnam and The Voice Kids is brought in, where audience can vote for an artist who was previously eliminated before the final to come back and compete in the live finals on the website SaoStar.vn. Color key: Week 1 and 2 (April 30 & May 7, 2017) Week 3 (May