Perhaps you should try some spelling variations:
ban hanh » ban hang
su triet » su viet, ve triet
va thanh » gia thanh, ban thanh, va tinh
su tien » su kien, su hien, tu tieng
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
so sac » so sach, so dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky sang ma hoi. hieu va cam luc ((ban hanh) or (va thanh)) cao ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky sang ma hoi. hieu va cam luc ((ban hanh) OR (va thanh)) cao ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: so sac ky sang ma hoi. hieu va cam luc ((ban hanh) or (va thanh)) cao ((su triet) or (su tien))*.