Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
su triet » su tien, ve triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc ban » duc ban, cuc ban, luc bat
su viet » so viet
ma hoi » mai hoi, xa hoi, ma hoa

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