Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
va nam » van nam, ha nam
va nay » va ngay, va cay

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 y nang xa hoi. hieu ((va nam) OR (va nay)) tu va thanh vi ((cua triet) OR (va triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ((va nam) OR (va nay)) tu va thanh vi ((cua triet) or (va triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ((va nam) OR (va nay)) tu va thanh vi ((cua triet) or (va triet))*.