Hai bàn tay đã quàng chiếc khăn này cho tôi

đáng ra phải cho tôi nhiều ấm áp hơn nữa.

(The two hands that left me this scarf

would have given me more warmth.)

I think this part was written for his father. He wanted to say that instead of the scarf his father gave him after he passed away, Tablo wish he's still alive to give him warm by his hand. I dont know just a thought.