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
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va
cac duc » cac du, cao duc, cac dac
dat cua » dai cua, day cua, mat cua
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang

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