Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh cong » trinh dung
cong dung » cuong dung, cong dong, cong luong
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 - hanh trinh cong dung trong ((dan than) or (van than)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh cong dung trong ((dan than) OR (van than)) cap.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh cong dung trong ((dan than) or (van than)) cap*.