Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cau » toan cau, phan cau, 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: doc ((chieu xanh) or (hieu lang)) - hanh tang cua nhung ((cong tan) OR (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (hieu lang)) - hanh tang cua nhung ((cong tan) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) or (hieu lang)) - hanh tang cua nhung ((cong tan) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (hieu lang)) - hanh tang cua nhung ((cong tan) OR (cong san)) than cau*.