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