Perhaps you should try some spelling variations:
sang lai » sang tai, sang lap, mang lai
van hanh » van thanh, ban hanh, van anh
ky sang » ky nang, ky dang, ky tang
lai roi » lai hoi, loi roi
hieu su » hieu sau, tieu su, hieu so
su chao » su cao, sau chan
va hanh » va thanh, va danh, ban hanh
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.

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