Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien sach » dien sach, kien sach, thien hach
trung cap » truong cao, trung tam
tran tuan » tran xuan, tran quang, tran thanh
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

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