Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
hanh va » hang va, hanh vi
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
va cua » va chua, via cua, ca cua
tu cai » tu cac, tu can, tu bai
ma hoi » mai hoi, xa hoi, ma hoa
tu ban » thu ban, te ban
va cam » va cham, va cac, va cao

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 cai) OR (tu ban)) ky sang ma hoi. hieu ((va cam) OR (ve cham)) truc van hanh va cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((tu cai) or (tu ban)) ky sang ma hoi. hieu ((va cam) or (ve cham)) truc van hanh va cua tre*.