Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung tam, tran tuan, truong thanh
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
san toan » dan toan, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - thanh ((trung tuan) OR (trung thanh)) nhung cong ((san toan) OR (van toan)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - thanh ((trung tuan) OR (trung thanh)) nhung cong ((san toan) or (van toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - thanh ((trung tuan) OR (trung thanh)) nhung cong ((san toan) or (van toan)) cao*.