Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thien thanh » tien thanh, thi thanh, hien hanh
chieu xanh » chieu sach, chieu sang, chieu tinh
cua truong » cua trung, xuan truong, cac truong
tranh cua » doanh cua, manh cua
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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 ((thien thanh) OR (chieu xanh)) - canh tranh cua truong cong tan van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (chieu xanh)) - canh tranh cua truong cong tan van ban*.