Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, nhung don
hoc chiet » hoc thiet, hoc nhiet, hoc hien
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - canh tranh cua ((nhung cong) or (hang cong)) ((dan toan) OR (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - canh tranh cua ((nhung cong) OR (hang cong)) ((dan toan) OR (manh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - canh tranh cua ((nhung cong) or (hang cong)) ((dan toan) OR (manh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - canh tranh cua ((nhung cong) or (hang cong)) ((dan toan) OR (manh toan)) ban*.