Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
sach tham » sach nha
sach thu » sach thue, sach thieu, cach thuc
va thanh » gia thanh, ban thanh, va tinh
qua cam » qua cham, qua cac, qua ca
van cua » vang cua, ban cua, dan cua
cam tu » cam thu, nam tu, dam tu
o hai » co hai, so hai, o lai
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: thu ((sach thu) OR (sach tham)) nang ((x hoi) or (o hai)). hieu qua cam tu va thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach thu) OR (sach tham)) nang ((x hoi) OR (o hai)). hieu qua cam tu va thanh van cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach thu) OR (sach tham)) nang ((x hoi) or (o hai)). hieu qua cam tu va thanh van cua triet*".