Perhaps you should try some spelling variations:
luan phung » luan phuong, luan chung, luan phong
chieu sang » chieu sach, chieu xanh, hieu lang
phung cong » nhung cong, phong cong, nhung chong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
cong san » cong tac
than cau » phan cau, than cap, thanh chau
toan cau » 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: doc ((hieu xanh) or (chieu sang)) - anh tang luan phung cong san ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu sang)) - anh tang luan phung cong san ((than cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu sang)) - anh tang luan phung cong san ((than cau) or (toan cau))*.