Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trinh » canh tranh, hanh chinh
luong cong » dung cong, trong cong, cong cong
thanh phan » thanh pho, thanh san, thanh toan
trinh dai » trinh tai, trinh di, trinh da
dai luong » dai cuong, dai duong, do luong
thanh hai » thanh hoa, thanh san
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chiet tach)) - hanh trinh dai luong cong san ((thanh hai) OR (thanh phan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - hanh trinh dai luong cong san ((thanh hai) OR (thanh phan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chiet tach)) - hanh trinh dai luong cong san ((thanh hai) OR (thanh phan))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chiet tach)) - hanh trinh dai luong cong san ((thanh hai) OR (thanh phan))*.