Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
pham thuc » phap thuc, pham chuc, nham thuc
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
danh dai » danh dau, danh di, vanh dai
danh sai » dung sai, danh bat, danh dau
ty dang » ty xang, ky dang, ty hang
xay hoi » xa hoi, tay hoi, cay phoi
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet

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: thuoc sach ty dang xay hoi. hieu van pham thuc va ((danh dai) OR (danh sai)) cua tre~.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty dang xay hoi. hieu van pham thuc va ((danh dai) or (danh sai)) cua tre*.