Perhaps you should try some spelling variations:
nang lai » nang tai, mang lai, nang cai
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
lai hoi » dai hoi, lai hoa, lai roi
thi van » thi lan, thi hanh, thi nang
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) y nang lai hoi. thi van nam ((duc va) or (thuc vat)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang lai hoi. thi van nam ((duc va) OR (thuc vat)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y nang lai hoi. thi van nam ((duc va) or (thuc vat)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y nang lai hoi. thi van nam ((duc va) or (thuc vat)) hanh vai cua tre*.