Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu sang » chieu sach, chieu xanh, hieu lang
nhung nong » nhung cong, nhung bong, nhung chong
hieu manh » chieu xanh, hieu nganh, dieu hanh
manh toan » thanh toan, anh tuan, tinh toan
trang va » tran van, hang va
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu sang)) - hanh trang va nhung nong ((dan toan) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu sang)) - hanh trang va nhung nong ((dan toan) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu sang)) - hanh trang va nhung nong ((dan toan) or (manh toan)) cao*.