Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sau chao » sau cho, sau chan, cau cham
hieu sau » hieu su, hieu suat, tieu su
tu sang » thu sang, tu san, tu lang
chao vu » chao xu, cao vu, chao chu
lai hoi » dai hoi, lai hoa, lai roi
ky dang » ky nang, ky danh
ke mang » ke nang, ke trang
ky mang » ky nang, ky tang, cay mang
vu van » tu van
vi cua » vai cua, di cua
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 sang ((((ky mang) or (ke mang))) or (ky dang)) lai hoi. hieu sau chao vu van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sang ((((ky mang) OR (ke mang))) OR (ky dang)) lai hoi. hieu sau chao vu van hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sang ((((ky mang) or (ke mang))) or (ky dang)) lai hoi. hieu sau chao vu van hanh vi cua te*.