Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu xanh » hieu manh, hieu nganh, dieu hanh
trang va » tran van, hang va
tac toan » tap toan, tam toan, hach toan
tap quan » tac quan, hai quan
va dung » van dung, va duong, vat dung

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 xanh)) - hanh trang va dung trong ((tac toan) or (tap quan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu xanh)) - hanh trang va dung trong ((tac toan) OR (tap quan)) cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu xanh)) - hanh trang va dung trong ((tac toan) or (tap quan)) cau*.