Perhaps you should try some spelling variations:
sang lai » sang tai, sang lap, mang lai
hieu sau » hieu suat, tieu su, hieu va
tu tang » tuc tang, tu trang, tu tong
tang ky » dang ky, trong ky, tang khu
ky sang » ky nang, ky dang, ky tang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » tieu su, hieu so, hieu suat
chao su » cao su, chao xu, achat su
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua te » cua tu
su va » su van, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tang ky sang lai hoi. ((hieu sau) or (hieu su)) chao su va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tang ky sang lai hoi. ((hieu sau) OR (hieu su)) chao su va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu tang ky sang lai hoi. ((hieu sau) or (hieu su)) chao su va hanh vi cua te*.