Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
mang lai » mang lam, mang luoi, dang loai
chat duc » chat xuc, chat doc, chet duoc
ky mang » ky nang, ke mang, ky dang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » hieu sau, tieu su, hieu so
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
di cua » dai cua, doi cua, de 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 sai ky mang lai hoi. ((hieu su) or (hieu suat)) chat duc va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky mang lai hoi. ((hieu su) OR (hieu suat)) chat duc va hanh di cua te.
• Adding a wildcard symbol may retrieve word variants: tu sai ky mang lai hoi. ((hieu su) or (hieu suat)) chat duc va hanh di cua te*.