Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van nhan » van phan, van thanh, danh nhan
nhan luc » nang luc
bat hanh » bat khanh, ban hanh, bao hanh
va triet » va thiet, va trien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
luc bat » suc bat, luc nhat, luat bat
su viet » so viet
x hoi » xa hoi, o hoi, x ho

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

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