Perhaps you should try some spelling variations:
sach tham » sach nha
cau treo » cau theo, cau tren, cau triet
sach thu » sach thue, sach thieu, cach thuc
hanh dai » hanh tai, hanh dao, vanh dai
dai cau » dat cau, da cau, dai hau
qua cac » cua cac
luc va » duc va, tuc va
loc va » hoc va
x hoi » xa hoi, o hoi, x ho

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) OR (sach tham)) nang x hoi. hieu qua cac ((luc va) or (loc va)) hanh dai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach tham)) nang x hoi. hieu qua cac ((luc va) OR (loc va)) hanh dai cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) OR (sach tham)) nang x hoi. hieu qua cac ((luc va) or (loc va)) hanh dai cau treo*".