Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thanh tran » thanh trang, thanh toan, thanh tra
tuan trong » thuan trong, quan trong, tran trong
hieu manh » chieu xanh, dieu hanh, hien hanh
tran tuan » tran xuan, tran quang, tran thanh
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hieu manh)) - thanh tran tuan trong cong ((dan than) OR (dan chan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) OR (hieu manh)) - thanh tran tuan trong cong ((dan than) or (dan chan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) OR (hieu manh)) - thanh tran tuan trong cong ((dan than) or (dan chan)) cau*.