Hi everyone, this is my cover with my friend, please give some advances to improve our skill 
https://www.youtube.com/watch?v=Y4XF1v96V5c
Hi Vu Huu Quy (I hope I’ve spelled your name correctly) and welcome to the forums!
Nice feel to your video. Would it be possible to post one where we can see your fingers and the whole flute? I think members would be interested and it might help them to give you the advice you have requested.