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