Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ly nang » ky nang, ly hang, ly vang
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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)) x hoi. lieu va cham ((hoc va) or (luc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((y nang) OR (ly nang)) x hoi. lieu va cham ((hoc va) OR (luc va)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach ((y nang) or (ly nang)) x hoi. lieu va cham ((hoc va) or (luc va)) hanh vi cua tre*.