Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh mang » nhanh mang, hanh trang, nhanh lang
van trong » van truong, vang trong, ban trong
mang van » dang van, tang van, lang van
dan toan » van toan, dan than, manh 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 ((thieu xanh) OR (chieu xanh)) - hanh mang van trong cong ((dan toan) or (tinh toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh mang van trong cong ((dan toan) OR (tinh toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - hanh mang van trong cong ((dan toan) or (tinh toan)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - hanh mang van trong cong ((dan toan) or (tinh toan)) tap*.