Perhaps you should try some spelling variations:
chiet tach » chieu sach
long thanh » luong thanh, dong thanh, rong thanh
cong thanh » dong thanh, cong trinh, cong tan
tong luan » tang luan, dung luan
hang luan » tang luan, dung luan
ho chiet » ho chieu, ho thiet, hoc thiet
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh ((tong luan) OR (hang luan)) thang ((long thanh) or (cong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((tong luan) OR (hang luan)) thang ((long thanh) OR (cong thanh)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((tong luan) OR (hang luan)) thang ((long thanh) or (cong thanh)) toan tap*".