Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
luan ung » luan hung, luon ung, luan chung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 - anh tang luan ung ((cong dan) OR (cong san)) ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - anh tang luan ung ((cong dan) or (cong san)) ((than cau) OR (phan cau))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - anh tang luan ung ((cong dan) or (cong san)) ((than cau) OR (phan cau))*.