Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van nang » van quang, van ban, van dong
va tham » van tham, va cham, va thanh
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
va chat » van chat, va phat, cao chat
soc va » hoc va, loc va, doc va
v nang » va nang, vu nang, voi nang
vi cua » vai cua, di cua

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 ((v nang) OR (van nang)) xa hoi. lieu ((va chat) or (va tham)) soc va danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((v nang) OR (van nang)) xa hoi. lieu ((va chat) OR (va tham)) soc va danh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((v nang) OR (van nang)) xa hoi. lieu ((va chat) or (va tham)) soc va danh vi cua tre*".