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 viet, su tien, ve triet
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
hieu va » lieu va, hieu qua
va nhan » van nhan, ca nhan, va phan
luc ban » duc ban, cuc ban, luc bat

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: thu sach ty hang xa hoi. hieu va nhan luc ban hanh vi ((va triet) OR (su triet))~.
• Adding a wildcard symbol may retrieve word variants: thu sach ty hang xa hoi. hieu va nhan luc ban hanh vi ((va triet) or (su triet))*.