I'm looking for the Vietnamese equivalent to Watson's Drug Store in Hanoi. I'm not talking about a pharmacy, but a store selling personal care products that are not sold in supermarkets or other places. Big C has a very limited inventory of such products.
I'm not so sure if this is what you look for, but Guardian comes to my mind: https://www.guardian.com.vn/en/store
Some addresses in Hanoi:
81 Vũ Trọng Phụng, P. Nhân Chính, Thanh Xuan
B1 Floor, Vincom Mega Mall Times City, 458 Minh Khai, W. Vĩnh Tuy, Hai Ba Trung
205 Kham Thien, Ward Tho Quan, Dong Da
Open from 9am to 10pm