Here are the answers:
Besides: adverb 'trạng từ'
1. moreover; furthermore; also: 'hơn nữa' Besides, I promised her we would come.
2. in addition 'thêm vào đó': There are three elm trees and two maples besides.
3. otherwise; else 'ngoài ra' : They had a roof over their heads but not much besides.
–prep. 'giới từ'
4. over and above; in addition to: 'ngoài ... còn có' Besides a mother he has a sister to support.
5. other than; except: 'ngoại trừ' There's no one here besides Bill and me.
Beside:
be·side. prep. 'giới từ'
1. by or at the side of; near 'bên cạnh, gần': Sit down beside me.
2. compared with 'so với': Beside him other writers seem amateurish.
3. apart from; not connected with 'lạc đề': beside the point; beside the question.
4. besides 'ngoại trừ' (theo định nghĩa 4, 5 của besides).
5. beside oneself, almost out of one's senses from a strong emotion, as from joy, delight, anger, fear, or grief 'nỗi điên nổi khùng, mất hết lý trí: He was beside himself with rage when the train left without him.
–adv. 'trạng từ'
6. along the side of something 'sóng đôi': The family rode in the carriage, and the dog ran along beside.
7. besides (def. 2).