Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
hanh tong » hanh trong, han tong, hanh dong
dung cong » dung trong
hach toan » thanh toan, manh toan
thanh hoa » thanh pho
tong qua » thong qua, tong quan, trong qua
qua dung » quang dung, su dung, qua song

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