Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
ho chiet » ho chieu, ho thiet, hoc thiet
can van » cac van, tan van, cao van
can ban » van ban, toan ban

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 cua ((hang cong) or (bang cong)) ((can van) or (can ban)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh cua ((hang cong) OR (bang cong)) ((can van) OR (can ban)) ban.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh cua ((hang cong) or (bang cong)) ((can van) or (can ban)) ban*.