Perhaps you should try some spelling variations:
chung thinh » chuong trinh, nhung thanh, nhung tinh
hung thinh » nhung thanh, hang chinh, tung hinh
hieu lang » chieu sang, hieu quang, nhieu tang
cong luan » tong luan, cong tuan, dong luan
luan hung » luan chung, lan hung, luan ung
cho hieu » cao hieu, co hieu, chi hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho hieu lang - thanh cong luan hung ((chung thinh) or (hung thinh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho hieu lang - thanh cong luan hung ((chung thinh) OR (hung thinh)) van ban*.