Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cam truc » cau truc, nam truc, lam truoc
truc ban » thuc ban, truc dan, truc van
thanh vi » hanh vi, thanh va, thanh ve
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
cai ky » cao ky, cac ky, sai ky
cam ky » cao ky, cac ky
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
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: tu ((cai ky) OR (cam ky)) nang ma hoi. hieu va cam truc ban thanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu ((cai ky) or (cam ky)) nang ma hoi. hieu va cam truc ban thanh vi cua tre*.