Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, trung cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (chinh sach)) - hanh trang cua dung ((cong tan) or (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chinh sach)) - hanh trang cua dung ((cong tan) OR (cong san)) toan tap.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chinh sach)) - hanh trang cua dung ((cong tan) or (cong san)) toan tap*.