Perhaps you should try some spelling variations:
thien chanh » thien chinh, hien hanh, tien thanh
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien chanh) or (thien thanh)) - thanh trung cua dong cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien chanh) OR (thien thanh)) - thanh trung cua dong cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien chanh) or (thien thanh)) - thanh trung cua dong cong tan tran cau*.