Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
danh doi » danh di, thanh doi, dung doi
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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: thu sach ky nang x hoi. ((lieu va) OR (hieu qua)) pham duc va danh doi cua tre~.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. ((lieu va) or (hieu qua)) pham duc va danh doi cua tre*.