Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va cau » van cau, va cac, va dau
ke cau » ket cau
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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: te sac ky nang ma hoi. hieu ((va cau) OR (ke cau)) luc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang ma hoi. hieu ((va cau) or (ke cau)) luc va hanh vi cua tre*.