I keep wondering how these Vasco guys managed to score 6 goals against Santos

In this game against Juventude, for example, Vasco had 77% possession, but they couldn't even score a single goal. This often made me wonder how they managed to score 6 goals against Santos. Juventude didn't have a very strong defense, but Vasco still didn't score a single goal. Two interesting things are worth mentioning:
1 - In the last 5 games, Juventude has conceded a goal in every game; in some games, they even conceded 3 goals.
2 - Juventude lost to Santos, in a game in which they conceded 3 goals.
So, Santos scores 3 goals and beats Juventude, then concedes 6 goals against Vasco, who wins and scores 2 goals against Juventude. Honestly, the Brazilian league is very unpredictable.