Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, me hoi
va bac » van bac, va cac, va bai

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ((ma hoi) OR (ma hoa)). lieu va bac duc va hanh than cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ((ma hoi) OR (ma hoa)). lieu va bac duc va hanh than cua tre*.