Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh de » hanh de, thanh ve, thanh do
tham xuc » tham nuoc, tham thuc, pham duc
so sach » bo sach, co sach, hoc sach
xuc ban » duc ban, cuc ban, quoc ban
va tham » van tham, va cham, va thanh
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
so sanh » do sanh
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) or (so sanh)) ((ky lang) OR (ky tang)) xa hoi. lieu va tham xuc ban thanh de cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ((ky lang) OR (ky tang)) 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) or (so sanh)) ((ky lang) OR (ky tang)) xa hoi. lieu va tham xuc ban thanh de cua tu".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ((ky lang) OR (ky tang)) xa hoi. lieu va tham xuc ban thanh de cua tu*.