Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
va cham » va chat, va tham
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
quoc va » nuoc va, duoc va, quoc gia
cua tre » cua te, cuu tre, cua triet
ve cham » ve chat, vu cham, ve chim
sach 2 » sach y
2 nang » v nang
x hoi » o hoi, x ho, 5 hoi

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: te sach 2 nang ((x hoi) OR (xa hoi)). hieu ((ve cham) OR (va cham)) quoc va hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach 2 nang ((x hoi) OR (xa hoi)). hieu ((ve cham) or (va cham)) quoc va hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach 2 nang ((x hoi) OR (xa hoi)). hieu ((ve cham) or (va cham)) quoc va hanh lai cua tre*.