Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thong cong » trong cong, tong cong, thong thong
thien anh » thien danh, tien anh, thien thanh
cua thong » cua thuong, cua khong, cua tong
van manh » van minh, van anh, van hanh
manh cua » doanh cua, ban cua
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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)) - van manh cua thong cong san ((toan tai) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - van manh cua thong cong san ((toan tai) or (toan ban))*.