Perhaps you should try some spelling variations:
thanh trung » thanh tung
truong cong » trong cong, truong dong, truong long
chieu sach » chinh sach, chieu sang, chieu xanh
cua truong » cua trung, xuan truong, cac truong
trung cua » truong cua, trung tuan, trung cap
toan can » toan ban, toan cao, toan cau
tan can » tan van, ban can, tac can

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 sach) OR (chiet tach)) - thanh trung cua truong cong ((tan can) or (toan can)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chiet tach)) - thanh trung cua truong cong ((tan can) OR (toan can)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) OR (chiet tach)) - thanh trung cua truong cong ((tan can) or (toan can)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) OR (chiet tach)) - thanh trung cua truong cong ((tan can) or (toan can)) cau*.