Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
qua dung » quang dung, su dung, qua song
cua dang » cua cong, cua ban
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh trung ((qua dung) or (cua dang)) cong ((dan than) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung ((qua dung) OR (cua dang)) cong ((dan than) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung ((qua dung) or (cua dang)) cong ((dan than) or (van toan)) cau*.