Perhaps you should try some spelling variations:
nuoc luan » luc luan
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cuu tre, cua triet
may hoi » may thoi, tay hoi, mai hoi
ky mang » ky nang, ke mang, ky dang
tu san » thu san, tu ban, tu can
vi cua » vai cua, di cua
tu sai » tu bai, tu cai, tu lai

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: ((tu sai) OR (tu san)) ky mang may hoi. hieu van cham ((cuc ban) OR (nuoc luan)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu san)) ky mang may hoi. hieu van cham ((cuc ban) or (nuoc luan)) hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu san)) ky mang may hoi. hieu van cham ((cuc ban) or (nuoc luan)) hanh vi cua tre*.