Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
sinh sach » chinh sach, sinh san, sang sach
trung cap » truong cao, trung tam
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh sach - thanh ((trung cap) or (trung tuan)) thong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - thanh ((trung cap) OR (trung tuan)) thong cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc sinh sach - thanh ((trung cap) or (trung tuan)) thong cong san toan ban*.