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