Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu sang » chieu sang, thieu quang, hieu lang
thanh tung » thanh cong
duong xanh » duong manh, duong van, duong sach
cua tuong » cua truong, cua thuong, cua huong
tung cua » trung cua, tuong cua, dung cua
tuan thu » toan thuc, van thu
doan tu » dan tu, toan tu, doanh thu

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 sang) OR (thieu khang)) - thanh tung cua tuong duong xanh ((doan tu) OR (tuan thu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - thanh tung cua tuong duong xanh ((doan tu) or (tuan thu))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu khang)) - thanh tung cua tuong duong xanh ((doan tu) or (tuan thu))*.