Perhaps you should try some spelling variations:
sang lai » sang tai, sang lap, mang lai
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
ky sang » ky nang, ky dang, ky tang
lai hoi » dai hoi, lai hoa, lai roi
hieu su » hieu sau, tieu su, hieu suat
va hanh » van hanh, va thanh, va danh
hieu so » thieu so
tu san » thu san, tu ban, tu can
cao tu » cao thu, co tu, cao su
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 san) or (tu cac)) ky sang lai hoi. ((hieu su) OR (hieu so)) cao tu va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu cac)) ky sang lai hoi. ((hieu su) OR (hieu so)) cao tu va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) or (tu cac)) ky sang lai hoi. ((hieu su) OR (hieu so)) cao tu va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu cac)) ky sang lai hoi. ((hieu su) OR (hieu so)) cao tu va hanh vai cua te*.