Perhaps you should try some spelling variations:
nam truc » nam truoc, nam thuc, nam trung
hanh dai » hanh tai, hanh dao, vanh dai
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve nam » he nam, va nam, le nam
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach v nang ((x hoi) OR (o hoi)). hieu ve nam truc va hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach v nang ((x hoi) OR (o hoi)). hieu ve nam truc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach v nang ((x hoi) OR (o hoi)). hieu ve nam truc va hanh dai cua tre*.