Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
kho tang » cao tang
dat cua » dai cua, day cua, mat cua
te sach » toc sach
ky tang » ky nang, ky dang, ky trong
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa

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 ((ky tang) OR (kho tang)) ma hoi. hieu van cham ((xuc va) OR (tuc va)) thanh dat cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky tang) OR (kho tang)) ma hoi. hieu van cham ((xuc va) or (tuc va)) thanh dat cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky tang) OR (kho tang)) ma hoi. hieu van cham ((xuc va) or (tuc va)) thanh dat cua tre*.