Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
dong hoai » dong hoi, dong hai, dang hoai
dung cong » dung trong
dong hoa » dong hoc, dong co
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 xanh) or (chieu sang)) - thanh ((dong hoa) or (dong hoai)) dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sang)) - thanh ((dong hoa) OR (dong hoai)) dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sang)) - thanh ((dong hoa) or (dong hoai)) dung cong dan toan cao*.