Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh doanh » hang doanh, chinh doanh, doanh doanh
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
song van » hoang van, trong van, duong van
khan cap » khan ap, khoan cam, phan cac
than cap » thanh lap, thanh cac, than cua

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 doanh cua thong ((song van) OR (cong quang)) ((khan cap) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh doanh cua thong ((song van) or (cong quang)) ((khan cap) OR (than cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh doanh cua thong ((song van) or (cong quang)) ((khan cap) OR (than cap))*.