Perhaps you should try some spelling variations:
hieu luan » hieu luat, hieu quan, tieu luan
luan nhan » luan phan, luan nha, xuan nhan
va thanh » gia thanh, ban thanh, va tinh
va triet » va trien, ve triet, cua triet
thanh vi » hanh vi, thanh va, thanh ve
nhan luc » nang luc
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
su sac » su sach, su cac, su xac
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
thiet » thieu

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

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