Perhaps you should try some spelling variations:
duong thanh » dong thanh, muong thanh, luong thanh
thanh trung » thanh tung
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thanh toan » thanh hoa, thanh san, tinh toan
cua nong » cua cong, cuu nong, cua song
cua dong » chua dong, cua cong, cua dang
toan cao » toan ban, toan tap

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 (chieu sang)) - thanh trung ((cua nong) OR (cua dong)) duong thanh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - thanh trung ((cua nong) OR (cua dong)) duong thanh toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - thanh trung ((cua nong) OR (cua dong)) duong thanh toan cao*.