Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
duy sang » duy van, duy anh, duy dung
chat duc » chat xuc, chat doc, chet duoc
cua tre » cuu tre, cua triet, dua tren
duc ban » duc tan, duc van, dua ban
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
tao hoi » tao khoi, tao boi, tay hoi
duy can » duy van
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((duy sang) or (duy can)) tao hoi. hieu ve chat duc ban thanh san ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((duy sang) OR (duy can)) tao hoi. hieu ve chat duc ban thanh san ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: toc sach ((duy sang) or (duy can)) tao hoi. hieu ve chat duc ban thanh san ((cua tre) or (cua te))*.