Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van chat » cao chat
sach thu » sach thue, sach thieu, sach tham
hang dai » hoang dai, hang tai, hang dau
cuu tre » cua tre, cau tren, cau treo
chat so » nhat so, chat co, chat bo
sach tu » cach tu, sach ty, sach uu
dai hoi » dai hoc, dai hai, dai moi
so ban » sao ban, so bang, co ban
cua te » cua tu

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 tu) OR (sach thu)) hang dai hoi. hieu van chat so ban thanh lap ((cuu tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach tu) OR (sach thu)) hang dai hoi. hieu van chat so ban thanh lap ((cuu tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te ((sach tu) OR (sach thu)) hang dai hoi. hieu van chat so ban thanh lap ((cuu tre) or (cua te))*.