Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
ky lang » ky nang, tay lang
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
nam xua » nam cua, nam mua, nam qua
xua ban » xuat ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((((ky lang) OR (ky tang))) or (ky dang)) xa hoi. lieu va nam xua ban hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((((ky lang) OR (ky tang))) OR (ky dang)) xa hoi. lieu va nam xua ban hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((((ky lang) OR (ky tang))) or (ky dang)) xa hoi. lieu va nam xua ban hanh vi cua tre*".