Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
van thanh » ban thanh, van tuan
ho chiet » ho chieu, ho thiet, hoc thiet
dan toan » van toan, dan than, manh toan
ban than » ban thanh, ban hang, ban hanh

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 - hanh trinh vat nhung cong ((dan toan) or (((ban than) or (van thanh)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh vat nhung cong ((dan toan) OR (((ban than) OR (van thanh)))) cau.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh vat nhung cong ((dan toan) or (((ban than) or (van thanh)))) cau*.