Perhaps you should try some spelling variations:
hanh cad » hanh cac, hanh cat, hanh cap
bach ky » bac ky
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
qua cac » cua cac
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
su viet » so viet
su tien » su kien, su hien, tu tieng
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky sang ma hoi. hieu qua cac luc va hanh cad ((su viet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach ky sang ma hoi. hieu qua cac luc va hanh cad ((su viet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: vu bach ky sang ma hoi. hieu qua cac luc va hanh cad ((su viet) or (su tien))*.