Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh van » tran van, trinh van, thanh van
phan tong » phan trong, phan cong, han tong
ban thanh » ban hanh, ban hang
van phan » van phong, van thanh, luan phan
dan toan » van toan, dan than, manh toan

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 sang) or (chiet tach)) - hanh tranh van phan tong ((dan toan) or (ban thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chiet tach)) - hanh tranh van phan tong ((dan toan) OR (ban thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chiet tach)) - hanh tranh van phan tong ((dan toan) or (ban thanh)) cao*.