Perhaps you should try some spelling variations:
sach van » sach va, bach van, cach van
sach han » sach tham, sach danh, sach nang
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
hanh de » hanh ve, hanh kem
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

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