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
cua thong » cua thuong, cua khong, suat thong
trong van » trong cac
cua tong » cua cong, cua dong, cua nong
khan cap » khan ap, than cap, khoan cam

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