Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
te sach » toc sach
dat cuu » dat cau, dat cua
cac day » cac dan, cac dai, cac cay
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va
nang ma » tang ma, sang ma, mang may

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 ((nang ma) OR (nang cao)) hoi. ((hieu ve) OR (hieu van)) cac day va thanh dat cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang ma) OR (nang cao)) hoi. ((hieu ve) or (hieu van)) cac day va thanh dat cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) OR (nang cao)) hoi. ((hieu ve) or (hieu van)) cac day va thanh dat cuu tre*.