Perhaps you should try some spelling variations:
hieu sau » hieu su, hieu suat, tieu su
sau chao » sau cho, sau chan, cau cham
ky sang » ky nang, ky dang, ky tang
lai roi » loi roi
lai hoi » dai hoi, lai hoa, mai hoi
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can
cua te » cua tu
san ky » sang ky, van ky, dan ky
su va » su van

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky sang ((lai roi) OR (lai hoi)). hieu sau chao ((su va) or (tu va)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky sang ((lai roi) OR (lai hoi)). hieu sau chao ((su va) OR (tu va)) hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky sang ((lai roi) OR (lai hoi)). hieu sau chao ((su va) or (tu va)) hanh vi cua te*".