Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tham xuc » tham nuoc, tham thuc, pham duc
thanh de » hanh de, thanh ve, thanh do
so sach » so sanh, bo sach, co sach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
va tham » van tham, va cham, va thanh
xuc ban » duc ban, cuc ban, quoc ban
de cua » le cua, te cua, dieu cua
cua tu » cua tuc, cua su, cua cu

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 lang) OR (ky dang)) xa hoi. lieu va tham xuc ban thanh de cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky lang) OR (ky dang)) xa hoi. lieu va tham xuc ban thanh de cua tu".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky lang) OR (ky dang)) xa hoi. lieu va tham xuc ban thanh de cua tu*.