Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, tu cach
vai cua » dai cua, hai cua, lai 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 tang » ky nang, ky dang, kho tang
ky sang » ky nang, ky dang, duy sang
te sach » toc sach
cua tu » cua tuc, cua su, cua cu
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) OR (ky tang)) lai hoi. hieu su chao xu va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((ky sang) OR (ky tang)) lai hoi. hieu su chao xu va hanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ((ky sang) OR (ky tang)) lai hoi. hieu su chao xu va hanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ((ky sang) OR (ky tang)) lai hoi. hieu su chao xu va hanh vai cua tu*.