Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
nam xuc » cam xuc, nam xua, nam thuc
cuu tre » cua tre, cau tren, cau treo
mai hoi » mai khoi, dai hoi, lai hoi
va nam » van nam, ha nam, va nay
y sang » _ sang, duy sang
va dan » ca dan, va dao, va dap
va dau » va dao
va cuu » va cau, va chu, va huu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y sang ((mai hoi) or (xa hoi)). hieu va nam xuc ((va dan) or (va dau)) va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y sang ((mai hoi) OR (xa hoi)). hieu va nam xuc ((va dan) OR (va dau)) va cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y sang ((mai hoi) or (xa hoi)). hieu va nam xuc ((va dan) or (va dau)) va cuu tre*.