Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
luc bat » suc bat, luc nhat, luat bat
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
va nhan » van nhan, ca nhan, va phan
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
luc ban » duc ban, cuc ban, luc van

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: tu sach ty nang xa hoi. hieu va nhan ((luc ban) OR (luc bat)) hanh vi ((va thiet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu va nhan ((luc ban) OR (luc bat)) hanh vi ((va thiet) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu va nhan ((luc ban) OR (luc bat)) hanh vi ((va thiet) or (su triet))*.