Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va trien » va truyen, va thiet, va tuyen
van hanh » van thanh, ban hanh, van anh
van nhan » van phan, van thanh, danh nhan
va nhan » ca nhan, va phan, va nha
luc van » luoc van, luu van, duc van
sai ky » sac ky
nang o » nang co, nang ho, nang ro
tu sai » tu bai, tu san, tu cai
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang o hoi. hieu ((va nhan) or (van nhan)) luc van hanh vi ((va trien) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang o hoi. hieu ((va nhan) OR (van nhan)) luc van hanh vi ((va trien) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang o hoi. hieu ((va nhan) or (van nhan)) luc van hanh vi ((va trien) or (su triet))*.