Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua dong » chua dong, cua cong, cua dang
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - thanh trung cua dong ((cong tan) or (cong tac)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh trung cua dong ((cong tan) OR (cong tac)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh trung cua dong ((cong tan) or (cong tac)) ((toan cao) or (toan ban))*.