Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thien van » thi van
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
dong hoa » dong hoc, dong co
lam duoc » nam duoc, luat duoc, lam thuoc
van cua » vang cua, ban cua, dan cua
so sach » so sanh, bo sach, co sach
ky dong » ly dong, ky dang, ky cong
hoa hoi » khoa hoi, hoa hoc, hoa doi
so sac » so dac
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sac) OR (so sach)) ky dong hoa hoi. thien van ((lam duoc) or (nam thuoc)) ban thanh van cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sac) OR (so sach)) ky dong hoa hoi. thien van ((lam duoc) OR (nam thuoc)) ban thanh van cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sac) OR (so sach)) ky dong hoa hoi. thien van ((lam duoc) or (nam thuoc)) ban thanh van cua tu".
• Adding a wildcard symbol may retrieve word variants: ((so sac) OR (so sach)) ky dong hoa hoi. thien van ((lam duoc) or (nam thuoc)) ban thanh van cua tu*.