Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
qua nhan » cua nhan, qua nhat, qua phan
nhan cuc » nhan cuoc, nhanh cuc, nhan luc
ban hanh » ban hang
va trien » va truyen, va thiet, va tuyen
su triet » su tien, ve triet
sach ky » sac ky, sach y, sach ty
cuc ban » cua ban, cac ban, cuu ban
su viet » so viet
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: thu sach ky nang x hoi. hieu qua nhan cuc ban hanh vi ((va trien) OR (((su triet) OR (su viet))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. hieu qua nhan cuc ban hanh vi ((va trien) or (((su triet) OR (su viet))))~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang x hoi. hieu qua nhan cuc ban hanh vi ((va trien) or (((su triet) OR (su viet))))*.