Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cac xuc » cac nuoc, chat xuc, cac cuoc
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ky nang ma hoi. hieu ve ((cac xuc) OR (cam xuc)) va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ky nang ma hoi. hieu ve ((cac xuc) OR (cam xuc)) va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thuoc sach)) ky nang ma hoi. hieu ve ((cac xuc) OR (cam xuc)) va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ky nang ma hoi. hieu ve ((cac xuc) OR (cam xuc)) va hanh vai cua tre*.