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 dung » cua dang, cua dong, qua dung
cong san » cong tac
than ban » thanh ban, toan ban, than man

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 dung ((huong dan) or (cong san)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh trung cua dung ((huong dan) OR (cong san)) than ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh trung cua dung ((huong dan) or (cong san)) than ban*.