Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thuong han » thuong mai, thuong va, thuong gap
thien anh » thien danh, tien anh, thien thanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua tong » cua dong, cua nong, cua song
han toan » van toan, dan toan, thanh toan
toan cau » toan cao, toan ban, toan tap

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) OR (thien anh)) - hanh sinh ((cua tong) OR (cua cong)) thuong han toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - hanh sinh ((cua tong) OR (cua cong)) thuong han toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - hanh sinh ((cua tong) OR (cua cong)) thuong han toan cau*.