Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh hai » thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
te sach » toc sach
duc ban » duc tan, duc van, dua ban
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
y tang » ky tang, 6 tang, 7 tang
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y tang ma hoi. ((hieu ve) OR (hieu van)) cac duc ban ((thanh hai) OR (thanh phan)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y tang ma hoi. ((hieu ve) or (hieu van)) cac duc ban ((thanh hai) OR (thanh phan)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach y tang ma hoi. ((hieu ve) or (hieu van)) cac duc ban ((thanh hai) OR (thanh phan)) cua tre*.