Perhaps you should try some spelling variations:
chiet tach » chieu sach
cong quan » cuong quan, cong quang, tong quan
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
tac thanh » bac thanh, cac thanh, tcc thanh
ho chiet » ho chieu, ho thiet, hoc thiet
tac than » tam than, tac nhan, bac thanh

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 cong quan dung cong ((tac than) OR (tac thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh cong quan dung cong ((tac than) OR (tac thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh cong quan dung cong ((tac than) OR (tac thanh)) cau*.