Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
toc sach » hoc sach, doc sach, thuoc sach
thuoc va » thuc va, thuoc ma, thuong va
sach ky » sac ky, sach y, sach ty
dan tai » van tai, dan thi, han tai
dan vai » dan va, dan vat, den vai
hieu va » lieu va
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
ha hoi » hoa hoi, ha noi, xa hoi

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: toc sach ky lang ha hoi. ((hieu va) OR (hieu qua)) nam thuoc va ((dan vai) OR (dan tai)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang ha hoi. ((hieu va) or (hieu qua)) nam thuoc va ((dan vai) OR (dan tai)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang ha hoi. ((hieu va) or (hieu qua)) nam thuoc va ((dan vai) OR (dan tai)) cuu tre*.