Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
tranh viet » tran viet, trinh viet, trang viet
viet chung » viet hung, viet phuong, viet thuong
cong bang » cuong bang, dong bang, hong bang
ho chieu » theo chieu, hoc thieu, mot chieu
cong ban » cong san, cong tan, cong dan

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 - canh tranh viet chung ((cong ban) or (cong bang)) thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - canh tranh viet chung ((cong ban) OR (cong bang)) thanh san*.