Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham thu » cam thu, pham thu, chim thu
nham thu » nham thuc, nam thu, pham thu
thanh vi » hanh vi, thanh va, thanh ve
nang ma » tang ma, sang ma, nang cao
luu tre » luu tru, cuu tre, luy tre
ma hoi » mai hoi, xa hoi, ma hoa
vi luu » vi lua

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 cac ky nang ma hoi. hieu qua ((cham thu) OR (nham thu)) ban thanh vi luu tre~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ma hoi. hieu qua ((cham thu) or (nham thu)) ban thanh vi luu tre*.