Perhaps you should try some spelling variations:
van nhan » van phan, van thanh, danh nhan
nhan luc » nang luc
va trien » va truyen, va thiet, va tuyen
bat hanh » bat khanh, ban hanh, bao hanh
hieu van » hieu va, thien van, lieu va
luc bat » suc bat, luc nhat, luat bat
sach ky » sach y, sach ty, sach kem
su viet » so viet
sac ky » cac ky, sai ky
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: tu ((sach ky) or (sac ky)) nang x hoi. hieu van nhan luc bat hanh vi ((va trien) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang x hoi. hieu van nhan luc bat hanh vi ((va trien) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang x hoi. hieu van nhan luc bat hanh vi ((va trien) or (su viet))*.