Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » tay hoi, cay phoi, gay thoi
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
nuoc » quoc, duoc, ngoc

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 ky dang ((xay hoi) OR (xa hoi)). hieu ve ((cau luc) OR (dat nuoc)) va thanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang ((xay hoi) OR (xa hoi)). hieu ve ((cau luc) or (dat nuoc)) va thanh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang ((xay hoi) OR (xa hoi)). hieu ve ((cau luc) or (dat nuoc)) va thanh dai cua triet*.