Perhaps you should try some spelling variations:
thuong dong » phuong dong, tuong dong, chuong dong
luan thuong » luat thuong, lan thuong, luan phuong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
xanh dung » anh dung, manh dung, hanh dung
dong dan » dong danh, duong dan, dong san
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan 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 (hieu manh)) - xanh dung luan thuong dong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - xanh dung luan thuong dong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - xanh dung luan thuong dong dan toan cau*.