Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
so sach » so sanh, bo sach, co sach
sach va » sach xa, sach ha, sach dao
cua tre » cuu tre, cua triet, dua tren
hanh de » hanh ve, hanh kem
cua te » cua tu
ke cau » ket cau
ve cau » va cau, ve cac, le cau
va ban » van ban, va bai, va bao
x hoi » xa hoi, o hoi, x ho
ban x » ban xu, ban _, ban 1

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: so sach va ban x hoi. hieu ((ve cau) OR (ke cau)) truc van hanh de ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach va ban x hoi. hieu ((ve cau) OR (ke cau)) truc van hanh de ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: so sach va ban x hoi. hieu ((ve cau) OR (ke cau)) truc van hanh de ((cua tre) or (cua te))*.