Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, chat xuc, cac cuoc
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
ky danh » ky anh, ky dang
ky lang » ky nang, ky dang, ky tang

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: tu sach ((ky lang) OR (ky danh)) xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) va danh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky danh)) xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) va danh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky danh)) xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) va danh vai cua tre*.