Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
va thanh » gia thanh, ban thanh, va tinh
lai cua » dai cua, hai cua, lai chau
qua cac » cua cac
qua cai » qua hai, qua ca, quan cau
sach ty » sach y, sach tu, sach thu
may hoi » may thoi, tay hoi, mai hoi
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky

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 ty) or (sac ky)) mang may hoi. hieu ((qua cai) or (qua cac)) duc va thanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ty) OR (sac ky)) mang may hoi. hieu ((qua cai) OR (qua cac)) duc va thanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) or (sac ky)) mang may hoi. hieu ((qua cai) or (qua cac)) duc va thanh lai cua tre*.