Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » thong cong, hang cong, nhung don
tranh cua » doanh cua, manh cua
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan

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 - canh tranh cua ((nhung cong) or (dung cong)) ((dan than) OR (van than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - canh tranh cua ((nhung cong) OR (dung cong)) ((dan than) OR (van than)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - canh tranh cua ((nhung cong) or (dung cong)) ((dan than) OR (van than)) cao*".