Perhaps you should try some spelling variations:
su sach » so sach, vu sach
gia cua » gian cua, giau cua, gia cuc
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
mai hoi » mai khoi, dai hoi, lai hoi
va bao » va bai
ma hoi » xa hoi, ma hoa, me hoi
bao bo » bac bo, ban bo, nao bo

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) OR (va danh)) gia cua tre~.
• 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) OR (va danh)) gia cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) or (mai hoi)). lieu va bao bo ((va hanh) OR (va danh)) gia cua tre*.