Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
dung cong » dung trong
dung hoa » dung khoa, duong hoa, dung hoai
dung hai » dung tai, dung ha, dung sai
cong san » cong tac
san toan » van toan, dan toan, 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 sang) or (chieu sach)) - thanh ((dung hoa) or (dung hai)) dung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh ((dung hoa) OR (dung hai)) dung cong san toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - thanh ((dung hoa) or (dung hai)) dung cong san toan cao*.