Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
va chat » van chat, va phat, cao chat
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y nang ((xa hoi) or (mai hoi)). hieu ((va cam) or (va chat)) truc va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang ((xa hoi) OR (mai hoi)). hieu ((va cam) OR (va chat)) truc va thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang ((xa hoi) or (mai hoi)). hieu ((va cam) or (va chat)) truc va thanh dai cua tre*.