Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hien tach » chiet tach, vien bach, hien hanh
tranh cua » doanh cua, manh cua
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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 tach) OR (thien hach)) - canh tranh cua tong cong van toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tach) or (thien hach)) - canh tranh cua tong cong van toan ban*.