Perhaps you should try some spelling variations:
phap thuc » phap thu, phap hoc, phap tu
tham thuc » nham thuc, pham thuc, tam thuc
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam ky
ma hoi » mai hoi, xa hoi, ma hoa
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 nang ma hoi. hieu ve ((phap thuc) OR (tham thuc)) ban thanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu cai ky nang ma hoi. hieu ve ((phap thuc) or (tham thuc)) ban thanh vi cua tre*.