Discovered by Fox
To get the angle for the second and third sets, you need to target that left wall and then backwalk a certain amount so that Link's animation gets stuck. Basically you just flick right while targeting to get it. Then hold downleft to move away from the wall and release target.
The second set has two positions: the left target you just stand in that bottom left corner. For the top and right targets, aim the bombchu at the middle of the wooden beam. The positioning is pretty lenient.
For the third set, keep that angle and go to the back left corner and release the chu. You can release it just before the second target is hit and still hit the target.
![](https://s2.save4k.ru/pic/fXGOVoiRtgc/maxresdefault.jpg)