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