Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu xanh) or (hieu lang)) - hanh tang va nhung cong ((dan than) OR (dan chan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (hieu lang)) - hanh tang va nhung cong ((dan than) OR (dan chan)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) or (hieu lang)) - hanh tang va nhung cong ((dan than) OR (dan chan)) cap".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (hieu lang)) - hanh tang va nhung cong ((dan than) OR (dan chan)) cap*.