Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhan dang » nhan dan, phan dang, tran dang
dung cong » dung trong
dang cua » dung cua, dong cua, mang cua
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) OR (chieu sach)) - nhan dang cua dung cong van than cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sach)) - nhan dang cua dung cong van than cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sach)) - nhan dang cua dung cong van than cao*.