Perhaps you should try some spelling variations:
hieu sau » hieu suat, tieu su, hieu va
mang lai » mang lam, mang luoi, dang loai
ky mang » ky nang, ke mang, ky dang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » tieu su, hieu so, hieu suat
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
tu bai » tu ban, tu bat, te bai
xuc va » duc va, tuc va, xac va
bai ky » ban ky, sai ky, bac ky
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 bai ky mang lai hoi. ((hieu su) OR (hieu sau)) cam ((xuc va) or (luc va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky mang lai hoi. ((hieu su) OR (hieu sau)) cam ((xuc va) OR (luc va)) hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bai ky mang lai hoi. ((hieu su) OR (hieu sau)) cam ((xuc va) or (luc va)) hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu bai ky mang lai hoi. ((hieu su) OR (hieu sau)) cam ((xuc va) or (luc va)) hanh vi cua te*.