Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cau treo » cau theo, cau tren, cau triet
hieu ve » hieu va, hieu van
luu van » cuu van, luan van, luu hanh
van anh » van thanh, tuan anh, van minh
anh kem » hanh kem, anh kiem, banh kem
cuu tre » cua tre, cau tren
cam luu » tam luu
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
o hoi » co hoi, o hoc, o hai
x hoi » xa 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: toc sach y nang ((x hoi) OR (o hoi)). hieu ve cam luu van anh kem ((cuu tre) OR (cau treo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ((x hoi) OR (o hoi)). hieu ve cam luu van anh kem ((cuu tre) or (cau treo))~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ((x hoi) OR (o hoi)). hieu ve cam luu van anh kem ((cuu tre) or (cau treo))*.