Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hieu cua » hieu qua, dieu cua, bieu cua
sach ty » sach y, sach tu, xach tay
cac xuc » cam xuc, cac nuoc, chat xuc
va danh » va dinh, va dan, va hanh
co hoi » co loi
xuc va » duc va, tuc va, luc va
cho cu » cho chu, cho cua, cho ca
cu tre » cu tren, cua tre, cuu tre

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 ty) or (sach thu)) nang ((co hoi) or (co hoc)). hieu cua cac xuc va danh cho cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach thu)) nang ((co hoi) OR (co hoc)). hieu cua cac xuc va danh cho cu tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (sach thu)) nang ((co hoi) or (co hoc)). hieu cua cac xuc va danh cho cu tre*.