Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo thuoc » che thuoc, tao thuoc, thu thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
trung cua » truong cua, trung tuan, trung cap
cong cong » cong dong, trong cong, dung cong
lang ban » hang ban, lang van, nang ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo thuoc sach - thanh trung cua cong cong ((lang ban) or (van ban)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thuoc sach - thanh trung cua cong cong ((lang ban) OR (van ban)) ban.
• Adding a wildcard symbol may retrieve word variants: theo thuoc sach - thanh trung cua cong cong ((lang ban) or (van ban)) ban*.