Perhaps you should try some spelling variations:
sang lai » sang tai, sang lap, mang lai
ky sang » ky nang, ky dang, ky tang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » hieu sau, tieu su, hieu so
su chao » su cao, sau chan
chao tu » chao xu, cho tu, cao tu
va hanh » van hanh, va thanh, va danh
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky
cua tu » cua tuc, cua cu, cua vu
cua su » qua su

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 sang lai hoi. hieu su chao tu va hanh vi ((cua te) or (((cua tu) OR (cua su))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky sang lai hoi. hieu su chao tu va hanh vi ((cua te) OR (((cua tu) OR (cua su)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bai ky sang lai hoi. hieu su chao tu va hanh vi ((cua te) or (((cua tu) OR (cua su))))".
• Adding a wildcard symbol may retrieve word variants: tu bai ky sang lai hoi. hieu su chao tu va hanh vi ((cua te) or (((cua tu) OR (cua su))))*.