Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
cong ngang » cong nhan, cong quang, cong lang
thien anh » thien danh, tien anh, thien thanh
hanh tang » hanh trang, anh tang, hanh mang
toan chau » toan cau, tran chau, toan chay
tang cua » mang cua, hang cua, tang luan

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