Perhaps you should try some spelling variations:
cham cuu » cap cuu
chat cua » nhat cua, chat va, chat huu
doan vi » doan va, don vi, doan thi
va doan » va doanh, van doan, va dan
sach va » sach xa, sach ha, sach dao
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
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 ((cham cuu) OR (chat cua)) va doan 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 ((cham cuu) OR (chat cua)) va doan vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach va) or (sach y)) nang x hoi. hieu ve ((cham cuu) OR (chat cua)) va doan vi cua tre*.