Perhaps you should try some spelling variations:
dung truong » duong truong, dung trung, dung thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luan » tang luan, hang luan, bang luan
dang than » dang thanh, sang than, dang tran
than cao » toan cao, thai cao, than cap

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 manh) OR (chieu xanh)) - hanh mang luan ((dung truong) or (dung trong)) dang than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (chieu xanh)) - hanh mang luan ((dung truong) OR (dung trong)) dang than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) OR (chieu xanh)) - hanh mang luan ((dung truong) or (dung trong)) dang than cao".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) OR (chieu xanh)) - hanh mang luan ((dung truong) or (dung trong)) dang than cao*.