Perhaps you should try some spelling variations:
nhan luc » nang luc
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
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 luc 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 luc van hanh vi ((va triet) OR (su tien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sac ky)) nang x hoi. hieu va nhan luc 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 luc van hanh vi ((va triet) or (su tien))*.