Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
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, nang ma
va hanh » va thanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
va bac » van bac, va cac, va bai

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