Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nhan luc » nang luc
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc van » luoc van, luu van, duc van
x hoi » xa hoi, o hoi, x ho

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

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