Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cau tren » cu tren, dau tren, ca tren
thanh ke » thanh ket, thanh ve, thanh de
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
ve cau » ke cau, va cau, ve cac
y nang » ky nang, ly nang, v nang
x hoi » o hoi, x ho, 5 hoi

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 y nang ((x hoi) OR (xa hoi)). hieu ve cau luc van thanh ke ((cua tre) OR (cau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((x hoi) OR (xa hoi)). hieu ve cau luc van thanh ke ((cua tre) or (cau tren))~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((x hoi) OR (xa hoi)). hieu ve cau luc van thanh ke ((cua tre) or (cau tren))*.