Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
mang dai » lang dai, mang dat, mang dau
hieu sau » hieu su, tieu su, hieu va
chat xuc » chat huu, cam xuc, chao xu
ky mang » ky nang, ke mang, ky dang
dai hoi » dai hoc, dai hai, dai moi
va hanh » van hanh, va thanh, va danh
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky
xuc va » duc va, tuc va, luc va
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 bai ky mang dai hoi. ((hieu suat) or (hieu sau)) chat xuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky mang dai hoi. ((hieu suat) OR (hieu sau)) chat xuc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu bai ky mang dai hoi. ((hieu suat) or (hieu sau)) chat xuc va hanh vi cua te*.