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
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va bac » van bac, va cac, va bai
xuc va » duc va, tuc va, luc va

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

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