Perhaps you should try some spelling variations:
theo thuoc » che thuoc, thu thuoc
thong cong » trong cong, tong cong, thong thong
tao thuoc » cao thuoc, tac thuoc, tao duoc
trung cua » truong cua, trung tuan, trung cap
cong vang » cong lang, cong quang, cong ngang
tung cua » tuong cua, dung cua, tang cua
vang ban » van ban, hang ban, nang ban
ban ban » ban banh, van ban, can 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) or (tao thuoc)) sach - thanh ((tung cua) OR (trung cua)) thong cong vang ban ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo thuoc) OR (tao thuoc)) sach - thanh ((tung cua) OR (trung cua)) thong cong vang ban ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo thuoc) or (tao thuoc)) sach - thanh ((tung cua) OR (trung cua)) thong cong vang ban ban".
• Adding a wildcard symbol may retrieve word variants: ((theo thuoc) or (tao thuoc)) sach - thanh ((tung cua) OR (trung cua)) thong cong vang ban ban*.