Perhaps you should try some spelling variations:
so sach » bo sach, co sach, hoc sach
nay tuc » nay tu, cay thuc, day thuc
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
ty ang » ty xang, ty hang, ty anh
ang xa » lang xa, mang xa, dang xay
va nay » va ngay, va cay
va dan » ca dan, va dau, va dap
va dao » ca dao
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: ((so sach) OR (so sanh)) ty ang xa hoi. lieu va nay tuc ((va dan) or (va dao)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ty ang xa hoi. lieu va nay tuc ((va dan) OR (va dao)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ty ang xa hoi. lieu va nay tuc ((va dan) or (va dao)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ty ang xa hoi. lieu va nay tuc ((va dan) or (va dao)) vi cua tre*.