Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
hieu van » hieu va, thien van, lieu va
hai chau » lai chau, ha chau, hat chau
thuoc va » thuc va, thuoc ma, thuong va
van lam » van nam
sach ly » sach y, sach lo, sach ty
va danh » va dinh, va dan, va hanh
tang ma » mang may, tang van
hai cau » hai chu, hai hau, hang cau
hoi cau » hoi chu, hoc cau, hoa cau
ly tang » le tang, ly hang, ly vang
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly tang ma hoi. hieu van lam thuoc va danh ((((hai cau) OR (hoi cau))) OR (hai chau)) treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly tang ma hoi. hieu van lam thuoc va danh ((((hai cau) OR (hoi cau))) or (hai chau)) treo~".
• Adding a wildcard symbol may retrieve word variants: su sach ly tang ma hoi. hieu van lam thuoc va danh ((((hai cau) OR (hoi cau))) or (hai chau)) treo*.