Perhaps you should try some spelling variations:
sau chang » san chang, sau chan, sau thong
chang xue » chang xu
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
hieu sau » hieu su, hieu suat, tieu su
ky mang » ky nang, ke mang, ky dang
lai hoi » lai hoa, lai roi, mai hoi
dai hoi » dai hoc, dai hai, dai moi
vi cua » vai cua, di cua
tu bai » tu ban, tu bat, te bai
xue va » que va, tue va
bai ky » ban ky, sai ky, bac ky
cua te » cua tu

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 mang ((lai hoi) or (dai hoi)). hieu sau chang xue va thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bai ky mang ((lai hoi) OR (dai hoi)). hieu sau chang xue va thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu bai ky mang ((lai hoi) or (dai hoi)). hieu sau chang xue va thanh vi cua te*.