Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
dau tren » dau tien, dat tren, dau tieng
te sach » toc sach
xay hoi » xa hoi, tay hoi, cay phoi
nam xuc » cam xuc, nam xua, nam thuc
dan vat » dang vat, van vat, dan va
cua tre » cua te, cuu tre, cua triet
y dang » ky dang, 2 dang, _ dang
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y dang xay hoi. hieu van nam xuc va dan vat ((cua tre) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y dang xay hoi. hieu van nam xuc va dan vat ((cua tre) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach y dang xay hoi. hieu van nam xuc va dan vat ((cua tre) or (dau tren))*.