Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua thong » cua thuong, cua khong, cua tong
sinh cua » manh cua, dinh cuu, sinh va
dan toan » van toan, dan than, manh toan
van tuan » van quan, van ban, anh tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - hanh sinh cua thong thong ((dan toan) OR (van tuan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - hanh sinh cua thong thong ((dan toan) or (van tuan)) ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - hanh sinh cua thong thong ((dan toan) or (van tuan)) ban*.