Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
ky tang » ky nang, kho tang, ky trong
hai cua » thai cua, dai cua, hoi cua
ky dang » ky nang, ky danh
duc ban » duc tan, duc van, dua ban
su sac » su sach, su cac, su xac
va cam » va cham, va cac, va cao
va cai » va cac, va bai, va dai

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 sac ((ky tang) OR (ky dang)) xa hoi. hieu ((va cai) OR (va cam)) duc ban thanh hai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky tang) OR (ky dang)) xa hoi. hieu ((va cai) or (va cam)) duc ban thanh hai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) OR (ky dang)) xa hoi. hieu ((va cai) or (va cam)) duc ban thanh hai cua triet*.