Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » doanh cua, manh cua
dung cong » dung trong
dang toan » dang tran, dung toan, dang thanh
cua dung » cua dang, cua dong, qua dung
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 thien hach - canh tranh cua dung cong ((dang toan) OR (dan toan)) cao~.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - canh tranh cua dung cong ((dang toan) or (dan toan)) cao*.