Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
ban hanh » ban hang
nhan cuc » nhan cuoc, nhanh cuc, nhan luc
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
sach ky » sach y, sach ty, sach kem
cuc ban » cua ban, cac ban, cuu ban
va nhan » van nhan, ca nhan, va phan
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.

• 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 cuc ban hanh vi ((va trien) OR (su triet))~.
• 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 cuc ban hanh vi ((va trien) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sac ky)) nang x hoi. hieu va nhan cuc ban hanh vi ((va trien) or (su triet))*.