Perhaps you should try some spelling variations:
co sach » bo sach, cuon sach, hoc sach
nay tuc » nay tu, cay thuc, day thuc
ty hang » ly hang, ty xang, thi hang
cua tre » cua te, cuu tre, cua triet
ty anh » ly anh, thuy anh
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: co sach ((ty hang) or (ty anh)) 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: co sach ((ty hang) OR (ty anh)) xa hoi. lieu va nay tuc ((va dan) OR (va dao)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: co sach ((ty hang) or (ty anh)) xa hoi. lieu va nay tuc ((va dan) or (va dao)) vi cua tre*.