Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
danh dai » danh dau, danh di, danh sai
te sach » toc sach
qua cai » qua hai, qua cac, qua ca
cai tuc » cai tu, dai thuc, dai truc
xa danh » va danh, dia danh, nam danh
cua tre » cua te, cuu tre, cua triet

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 thu ((lang van) or (dang van)) hoe. hieu qua cai tuc xa danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((lang van) OR (dang van)) hoe. hieu qua cai tuc xa danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach thu ((lang van) or (dang van)) hoe. hieu qua cai tuc xa danh dai cua tre*.