Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
luong cong » trong cong, cong cong, tong cong
hanh tang » hanh trang, anh tang, hanh mang
tang quan » tang luan, nang quan, tong quan
dung cong » dung trong
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (nhieu tang)) - hanh tang quan ((luong cong) OR (dung cong)) tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (nhieu tang)) - hanh tang quan ((luong cong) OR (dung cong)) tac toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (nhieu tang)) - hanh tang quan ((luong cong) OR (dung cong)) tac toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (nhieu tang)) - hanh tang quan ((luong cong) OR (dung cong)) tac toan tap*.