Perhaps you should try some spelling variations:
dong thanh » truong thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chinh » hoan chinh, hoc sinh, hoc kinh
dung dong » dung cong, vung dong, dung trong
tranh va » tranh van, trang va, trinh va
tran huu » tran duc
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chinh sach - hanh tranh va dung dong thanh ((tran huu) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - hanh tranh va dung dong thanh ((tran huu) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - hanh tranh va dung dong thanh ((tran huu) or (toan cau))*.