Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
phan tang » phap tang, phan dang, phan cang
tang luan » dung luan
nong cong » cong cong, tong cong, dong cong
nang cong » nang song, dang cong, bang cong
dan toan » van toan, dan than, manh toan
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: doi ((chieu xanh) or (chieu sang)) - phan tang luan ((nong cong) OR (nang cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sang)) - phan tang luan ((nong cong) OR (nang cong)) dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sang)) - phan tang luan ((nong cong) OR (nang cong)) dan toan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sang)) - phan tang luan ((nong cong) OR (nang cong)) dan toan cau*.