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 cua » dai cua, day cua, mat cua
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van 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 (v 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 (v 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 (v nang)) mai hoi. ((hieu ve) or (hieu van)) cac duc va thanh dat cua tre*.