Perhaps you should try some spelling variations:
thanh cac » hanh cac, thanh bac, thanh ca
ban thanh » ban hanh, ban hang
kho tang » cao tang
sach kho » bach khoa, sach dao, sach nha
te sach » toc sach
chu tre » cho tre, cuu tre, cau tren
duc ban » duc tan, duc van, dua ban
ve chat » va chat, van chat
ve cham » va cham, vu cham, ve chim
tang ha » lang ha, tang ma, trung ha
chu tri » chua tri, chu thi, chu tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach kho tang ha noi. hieu ((ve cham) or (ve chat)) duc ban thanh cac ((chu tre) OR (chu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach kho tang ha noi. hieu ((ve cham) OR (ve chat)) duc ban thanh cac ((chu tre) OR (chu tri)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach kho tang ha noi. hieu ((ve cham) or (ve chat)) duc ban thanh cac ((chu tre) OR (chu tri))".
• Adding a wildcard symbol may retrieve word variants: te sach kho tang ha noi. hieu ((ve cham) or (ve chat)) duc ban thanh cac ((chu tre) OR (chu tri))*.