Perhaps you should try some spelling variations:
thanh trung » thanh tung
kien sach » dien sach, vien bach, kien mac
trung cua » truong cua, trung tuan, trung cap
hanh tung » thanh tung, manh tung, hanh dung
hoc kien » hoc hien, hoc vien, hoa kien
han tung » han tong, han ung, van tung
than cap » khan cap, thanh lap, thanh cac

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien sach - thanh trung cua ((han tung) OR (hanh tung)) dan ((thanh pho) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc kien sach - thanh trung cua ((han tung) OR (hanh tung)) dan ((thanh pho) or (than cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc kien sach - thanh trung cua ((han tung) OR (hanh tung)) dan ((thanh pho) or (than cap))*.