Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va danh, ban hanh
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
ly nang » ky nang, ly hang, ly vang
sach ly » sach y, sach lo, sach ty
cua tre » cua te, cuu tre, cua triet
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ly nang ((x hoi) or (o hoi)). hieu van cam luc ((va hanh) OR (va thanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly nang ((x hoi) OR (o hoi)). hieu van cam luc ((va hanh) OR (va thanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly nang ((x hoi) or (o hoi)). hieu van cam luc ((va hanh) OR (va thanh)) vai cua tre*".