Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
su sach » vu sach
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
su viet » so viet
hieu ve » hieu va, hieu van
xang xa » lang xa, mang xa, ang xa
so sach » so sanh, bo sach, co sach
cac ly » cac ky, cac le, cam ly
ve cac » va cac, vien cac

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) OR (so sach)) ty xang xa hoi. hieu ve cac ly va hanh vai ((cuu tre) OR (su viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ty xang xa hoi. hieu ve cac ly va hanh vai ((cuu tre) or (su viet))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ty xang xa hoi. hieu ve cac ly va hanh vai ((cuu tre) or (su viet))*.