Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
dung cong » dung trong
thanh chu » thanh chau, thanh cha, thanh thu
doi hieu » doi chieu, doc hieu, doi hien
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac

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 - hanh tranh cua dung cong dan ((thanh chu) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - hanh tranh cua dung cong dan ((thanh chu) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh tranh cua dung cong dan ((thanh chu) or (than cap))*.