Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh gia » danh gia, thanh gian, hinh giao
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
bao bo » bac bo, ban bo, nao bo
ma hoi » xa hoi, ma hoa, me hoi
va bao » va bai
bo va » bao va, do va, so 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: su sach ky nang ((ma hoi) OR (mai hoi)). lieu va bao bo va hanh gia ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) or (mai hoi)). lieu va bao bo va hanh gia ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) or (mai hoi)). lieu va bao bo va hanh gia ((cua tre) OR (cua triet))*.