Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
va triet » va thiet, ve triet, cua triet
sach ly » sach y, sach lo, sach ty
su sach » so sach, vu sach
qua cau » quan cau, qua cac, qua ca
ly nang » ky nang, ly hang, ly vang
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
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: su sach ly nang x hoi. hieu qua cau ((luc va) OR (tuc va)) hanh vi ((va triet) OR (va trien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang x hoi. hieu qua cau ((luc va) or (tuc va)) hanh vi ((va triet) OR (va trien))~".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu qua cau ((luc va) or (tuc va)) hanh vi ((va triet) OR (va trien))*.