Perhaps you should try some spelling variations:
thanh trung » thanh tung
truong dong » trong dong, truong dang, tuong dong
chieu sach » chinh sach, chieu sang, chieu xanh
cua truong » cua trung, xuan truong, cac truong
khang chan » khang chien, quang chan
trung cua » truong cua, trung tuan, trung cap
dong tac » cong tac, dong tai, dong bac
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chiet tach)) - thanh trung cua truong dong tac ((than cap) or (khang chan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - thanh trung cua truong dong tac ((than cap) OR (khang chan)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - thanh trung cua truong dong tac ((than cap) or (khang chan))*.