Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tung » thanh cong
cong luong » cong thuong, nang luong, cong dong
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang
tung cu » tuong cu, dung cu, trung cua
cu cong » cua cong, cuu cong, cau cong

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 ((chieu xanh) OR (chinh sach)) - thanh tung cu cong luong ((dan than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chinh sach)) - thanh tung cu cong luong ((dan than) OR (ban than)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chinh sach)) - thanh tung cu cong luong ((dan than) OR (ban than)) cau*.