Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
cong huong » cong thuong, cong luong, dong huong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong hung » cong chung, cong dung, cong thuong
cong cua » cong cu, dong cua, huong cua
dan chan » dan gian, dan ca, van chat
chan ta » chan tha, nhan tai, nhan tao

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 (hieu manh)) - thanh cong cua ((cong huong) OR (cong hung)) dan chan ta~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - thanh cong cua ((cong huong) or (cong hung)) dan chan ta~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - thanh cong cua ((cong huong) or (cong hung)) dan chan ta*.