By Gabriel Tan in Bangkok
After losing their opening match to Thailand 2-1, the Azkals bounced back on Tuesday to beat Vietnam 1-0 thanks to Emelio Caligdong's 85th-minute winner.
Philippines now head into Friday's game at the Suphachalasai Stadium knowing three points would be enough to guarantee their spot in the semi-finals, regardless of what happens in the other game between Thailand and Vietnam, and Weiss believes this bodes well for their prospects.
"Our victory over Vietnam puts us in a good position," he said. "Whether we proceed or not is now in our own hands.
"The situation in the group is that every team still has a chance.
"We should put ourselves in the winning mode and go for the win. That should make us safe and we don't want to depend on others."
While Myanmar caused Vietnam plenty of problems last Saturday with their counterattacking style of play, Weiss believes his side will be up against a very different style of play on Friday as their opponents cannot afford to sit back.
"Myanmar are very strong on the counter and they are very disciplined, with two lines in defence and midfield defending very well," the German added. "But tomorrow [Friday] that will not help them.
"They will have to loosen up and go for an offensive mode and it will be interesting to see if they can switch from their normal style of play. It will be difficult for them to play on the counterattack because they have to score goals.
"As we did against Thailand and Vietnam, we have scouted our opponents very well and we were in good rhythm against Vietnam. We know what to do [on Friday]."
Philippines will be without Jerry Lucena against Myanmar as he has been recalled for club duty by Esbjerg, while there is also a fitness worry with Ray Jonsson.
However, their 47-year-old boss believes there is enough experience in his side to carry them through to the semi-finals.
"We have an injury worry with Ray Jonsson and Lucena is absent so we'll have to see our options," he revealed.
"We have a good pool of players and everyone understands our system, and we must not forget our back four is very strong and is a good advantage for our team.
"It puts me in the position where whoever I choose to come in can fill the void but anyone I pick coming into the side now must run for his life.
"The balance in the team is good with a good mix of players who have already played in the Suzuki Cup. These experienced players help to cast a good mood and ambience and that's the special feature of the team at the moment.
"Players like [Jeffrey] Christiaens and [Marwin] Angeles will soon be contenders for starting places in the team. But for now, they are here to learn and this is positive for the future."
Despite the tough task ahead of his side, Myanmar team manager Tim Myint Aung believes his players will not need any extra source of motivation on Friday.
"Tomorrow [Friday] we have to play very hard and we have to win," he said.
"After the match against Thailand [a 4-0 defeat], head coach [Park Sung-hwa] and I wanted to motivate the players, especially after such a big losing margin.
"But the players will have no bigger motivation tomorrow [Friday] than to sacrifice themselves for the country. We don't have any choice."
Although Tim Myint Aung is expecting a tough game against a very physical Azkals side, he believes there are weaknesses that Myanmar can exploit.
"I've seen Philippines play and they are strong physically and mentally," he added. "They play a different style to Vietnam and Thailand.
"It will be very difficult against Philippines but I believe our coach Park and the players will give their best performance and will use their [Philippines'] weaknesses to try and get the win."
Both sides have reached the semi-finals of the Suzuki Cup just once in their history; Myanmar in 2004, while Philippines' sole appearance in the last four came two years ago.