Perhaps you should try some spelling variations:
tong thuong » thong thuong, trong thuong, cong thuong
theo thuoc » che thuoc, tao thuoc, thu thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
dan khanh » dang khanh, van khanh, dat khanh
hang cua » mang cua, huong cua, thong cua
dan khan » dan chan, dan than, dan khai
hang ca » hang va, nang cao, hang tai

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 - hanh ((hang cua) OR (hang ca)) tong thuong ((dan khan) or (dan khanh)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thuoc sach - hanh ((hang cua) OR (hang ca)) tong thuong ((dan khan) OR (dan khanh)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo thuoc sach - hanh ((hang cua) OR (hang ca)) tong thuong ((dan khan) or (dan khanh)) cap".
• Adding a wildcard symbol may retrieve word variants: theo thuoc sach - hanh ((hang cua) OR (hang ca)) tong thuong ((dan khan) or (dan khanh)) cap*.