Perhaps you should try some spelling variations:
thuong dong » phuong dong, tuong dong, chuong dong
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
tang luan » dung luan
than cua » nhan cua, thai cua, ban cua
dong dan » dong danh, duong dan, dong san
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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