Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
quan trong » gian trong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » anh tang, hanh mang, hanh tung
cong tan » cong tac, cong san, cong thanh
tran tan » tran tuan, tran van, tran thanh
he hieu » he nhieu, he dieu, de hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: he hieu lang - ((hanh tang) or (hanh trang)) quan trong cong tan tran tan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: he hieu lang - ((hanh tang) OR (hanh trang)) quan trong cong tan tran tan.
• Adding a wildcard symbol may retrieve word variants: he hieu lang - ((hanh tang) or (hanh trang)) quan trong cong tan tran tan*.