Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
tham xuc » tham nuoc, tham thuc, pham duc
dieu cua » dieu tra
hoc sach » hoc sinh, hoc cac, hoc anh
so sach » so sanh, bo sach, co 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
de cua » le cua, te cua

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