Perhaps you should try some spelling variations:
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
su tien » su kien, su hien, tu tieng
tu sac » tu sach, tu san, tu bac
ma hoi » mai hoi, xa hoi, ma hoa

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 sac) OR (tu cac)) ky nang ma hoi. ((hieu ve) OR (hieu va)) cam duc va hanh va su tien~.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky nang ma hoi. ((hieu ve) or (hieu va)) cam duc va hanh va su tien*.