Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
luan thong » luan phong, luan tuong, luat thong
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai 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 tang luan thong thong ((tan toan) OR (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh tang luan thong thong ((tan toan) OR (tap toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - hanh tang luan thong thong ((tan toan) OR (tap toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - hanh tang luan thong thong ((tan toan) OR (tap toan)) ban*.