Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong hach » trong mach, trong hanh, trong thanh
trong cach » trong cac, trong mach, trong canh
hieu lang » chieu sang, hieu quang, nhieu tang
trung cao » truong cao, trung cap, trung co
toan tap » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - thanh trung cao dang ((trong hach) OR (trong cach)) toan tap~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung cao dang ((trong hach) or (trong cach)) toan tap*.