Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
cua truong » cua trung, xuan truong, cac truong
trung cua » truong cua, trung tuan, trung cap
toan cau » toan cao, toan ban, toan tap
bo dan » so dan, bo dao, bo day
co dan » co ban, ca dan, cao dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) or (chieu sach)) - thanh trung cua truong ((bo dan) OR (co dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - thanh trung cua truong ((bo dan) OR (co dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sach)) - thanh trung cua truong ((bo dan) OR (co dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - thanh trung cua truong ((bo dan) OR (co dan)) toan cau*.