Perhaps you should try some spelling variations:
dong thanh » truong thanh
hien hach » thien hach, hien nhanh, hien khanh
hien hanh » dieu hanh
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
dan toan » van toan, dan than, manh toan

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 ((hien hach) OR (hien hanh)) - canh tranh cua dong cong ((dong thanh) OR (dan toan)) cao~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hach) or (hien hanh)) - canh tranh cua dong cong ((dong thanh) or (dan toan)) cao*.