Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
cua truong » cua trung, xuan truong, cac truong
hieu xanh » hieu manh, hieu nganh, dieu hanh
cua trong » cua trung, qua trong, ca trong
cong san » cong tac
san gian » dan gian, san giao, van gian
gian cau » gian chau, gian cac, gian 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: doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((cua trong) OR (cua truong)) cong san gian cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((cua trong) or (cua truong)) cong san gian cau~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (chieu xanh)) - thanh trung ((cua trong) or (cua truong)) cong san gian cau*.