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