Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
bach tuoc » sach duoc, sach nuoc
dang khai » dang khoi, dang hai, quang khai
khai cua » thai cua, hai cua, khi cua
thi van » thi hanh, thi nang
thi lan » thi hanh, thi nang, thi lien
tuoc va » thuoc va, nuoc va, duoc va
va dang » van dang, va nang, va lang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y nang x hoi. ((thi van) or (thi lan)) bach tuoc va dang khai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang x hoi. ((thi van) OR (thi lan)) bach tuoc va dang khai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang x hoi. ((thi van) or (thi lan)) bach tuoc va dang khai cua tre*.