Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan tong » luan tuong, luan cong, luan dong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tuan ban » tuan bang, toan ban, luan ban

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 - hanh tang luan tong ((cong tan) OR (cong san)) tuan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh tang luan tong ((cong tan) or (cong san)) tuan ban*.