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
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
lang ban » hang ban, lang van, lang man
nang ban » hang ban, nang quan, nang sang

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 tong cong ((((lang ban) OR (nang ban))) or (van ban)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thuoc sach - thanh trung cua tong cong ((((lang ban) OR (nang ban))) OR (van ban)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo thuoc sach - thanh trung cua tong cong ((((lang ban) OR (nang ban))) or (van ban)) ban".
• Adding a wildcard symbol may retrieve word variants: theo thuoc sach - thanh trung cua tong cong ((((lang ban) OR (nang ban))) or (van ban)) ban*.