Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
dan than » dan chan, ban than, van than

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