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
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su

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 xa hoi. lieu va tham xuc ban thanh de ((cua tu) OR (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky lang xa hoi. lieu va tham xuc ban thanh de ((cua tu) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) ky lang xa hoi. lieu va tham xuc ban thanh de ((cua tu) OR (cua cu))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ky lang xa hoi. lieu va tham xuc ban thanh de ((cua tu) OR (cua cu))*.