Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trung » thanh trung, hanh trang, manh trung
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) or (hieu lang)) - hanh trung cua hang cong ((dan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hieu lang)) - hanh trung cua hang cong ((dan toan) OR (dan than)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hieu lang)) - hanh trung cua hang cong ((dan toan) or (dan than)) tap*.