Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh nang » ganh nang, hanh mang, hanh trang
dung cong » dung trong
anh nang » ganh nang, anh bang, anh dang
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 nang) or (anh nang)) cua dung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (hieu lang)) - ((hanh nang) OR (anh nang)) cua dung cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (hieu lang)) - ((hanh nang) or (anh nang)) cua dung cong dan chan cau*.