Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
trang va » tran van, hang va
tam toan » tam than, pham toan, tam thanh
tap toan » tap doan, tap quan, bai toan
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 tinh)) - hanh trang va dung trong ((tam toan) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (chieu tinh)) - hanh trang va dung trong ((tam toan) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (chieu tinh)) - hanh trang va dung trong ((tam toan) or (tap toan)) cau*.