Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
hieu van » hieu va, thien van, lieu va
sach va » sach xa, sach ha, sach dao
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
cuu va » cuu van, cuu ve
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 va) OR (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) cham cuu va dan vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach va) or (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) cham cuu va dan vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach va) or (sach y)) nang x hoi. ((hieu ve) OR (hieu van)) cham cuu va dan vi cua tre*.