Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
dong thanh » truong thanh
thien anh » thien danh, tien anh, thien thanh
tang luan » dung luan
luan cong » luat cong, luong cong, luan chung
anh tang » anh bang, anh dang, anh nang
toan cau » toan ban, toan tap, toan tai
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 (thien anh)) - anh tang luan cong dong thanh ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - anh tang luan cong dong thanh ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - anh tang luan cong dong thanh ((toan cau) or (toan cao))*.