Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
phuong dan » phuong danh, phuong doan, huong dan
thien anh » thien danh, tien anh, thien thanh
tang luan » dung luan
tang cua » mang cua, hang cua, thong cua
dan toan » van toan, dan than, manh toan
toan ban » van ban

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