Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
dang thai » dang thi, dang hai, dang khai
bach tuoc » sach duoc, sach nuoc
thai cua » than cua, tai cuc, tri cua
bac nuoc » cac nuoc, sach nuoc, hoc nuoc
thi nang » thi cong, ki nang, thi hanh
thi van » thi lan, thi hanh
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 nang)) ((bac nuoc) OR (bach tuoc)) va 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 nang)) ((bac nuoc) OR (bach tuoc)) va dang thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang x hoi. ((thi van) or (thi nang)) ((bac nuoc) OR (bach tuoc)) va dang thai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang x hoi. ((thi van) or (thi nang)) ((bac nuoc) OR (bach tuoc)) va dang thai cua tre*.