Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh hai » thanh phan, thanh hoa, thanh san
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
ma hoi » mai hoi, ma hoa, me hoi
du va » dau va, su va, vu va

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: te sach ky nang ((ma hoi) OR (xa hoi)). hieu va cac ((du va) OR (tu va)) thanh hai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((ma hoi) or (xa hoi)). hieu va cac ((du va) OR (tu va)) thanh hai cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((ma hoi) or (xa hoi)). hieu va cac ((du va) OR (tu va)) thanh hai cua triet*.