Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
cau phuc » cau truc, chau phu, huu phuc
hanh dai » hanh tai, hanh dao, vanh dai
ly nang » ky nang, ly vang, ly quang
ly hang » ly quang
van cau » van dau, van hau, van chat
phuc va » phuc vu, thuc va, chuc va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
ma hoi » mai hoi, xa hoi, ma hoa

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 ((y nang) or (((ly nang) OR (ly hang)))) ma hoi. hieu van cau phuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((y nang) OR (((ly nang) OR (ly hang)))) ma hoi. hieu van cau phuc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((y nang) or (((ly nang) OR (ly hang)))) ma hoi. hieu van cau phuc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((y nang) or (((ly nang) OR (ly hang)))) ma hoi. hieu van cau phuc va hanh dai cua tre*.