Perhaps you should try some spelling variations:
phat xuat » phan xuat, pham xuat, phap luat
ky sang » ky nang, ky dang, ky tang
lai hoi » dai hoi, lai hoa, mai hoi
lai roi » loi roi
hieu su » hieu sau, tieu su, hieu so
su phat » su pham, tu phat, xu phat
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang ((lai hoi) or (lai roi)). hieu su phat xuat va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ((lai hoi) OR (lai roi)). hieu su phat xuat va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((lai hoi) or (lai roi)). hieu su phat xuat va hanh vi cua te*.