Perhaps you should try some spelling variations:
sang lai » sang lap, mang lai, sang mai
sang tai » hang tai, sang tao, tang tai
chao tu » chao xu, cho tu, cao tu
va hanh » van hanh, va thanh, va danh
hieu su » hieu sau, tieu su, hieu so
su chao » su cao, sau chan
tu bai » tu ban, tu bat, te bai
bai ky » ban ky, sai ky, bac ky
cua tu » cua tuc, cua su, cua cu

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

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