Perhaps you should try some spelling variations:
nhan luu » nhan luc, nhan lupus, nhan luan
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
hieu ca » hieu cac, hieu cua, hieu va
luu van » cuu van, luan van, luu hanh
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 (sach ty)) nang x hoi. hieu ca nhan luu van hanh vi ((va triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang x hoi. hieu ca nhan luu van hanh vi ((va triet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang x hoi. hieu ca nhan luu van hanh vi ((va triet) or (hoa viet))*.