Perhaps you should try some spelling variations:
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
chat huu » pham huu
hieu su » hieu sau, tieu su, hieu so
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
lai hoi » dai hoi, lai hoa, lai roi
su chat » su phat, du chat, so chat
vi cua » vai cua, di cua
tu bai » tu ban, tu bat, te bai
cua cu » cua chu, cua cau, cua su

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) or (ky tang)) lai hoi. hieu su chat huu ((ban hanh) or (van hanh)) vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ((ky sang) OR (ky tang)) lai hoi. hieu su chat huu ((ban hanh) OR (van hanh)) vi cua cu.
• Adding a wildcard symbol may retrieve word variants: tu bai ((ky sang) or (ky tang)) lai hoi. hieu su chat huu ((ban hanh) or (van hanh)) vi cua cu*.