Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dang thai » dang thi, dang hai, dang khai
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
thai cua » than cua, tai cuc, tri cua
van dang » van dong, van dung, van nang
bac nuoc » bach tuoc, sach nuoc, hoc nuoc
thi lan » thi hanh, thi nang, thi lien
thi van » thi hanh, thi nang
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)) ((bac nuoc) or (cac nuoc)) van dang thai 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)) ((bac nuoc) OR (cac nuoc)) van dang thai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang x hoi. ((thi van) or (thi lan)) ((bac nuoc) or (cac nuoc)) van dang thai cua tre*.