Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien chanh » thien chinh, hien hanh, tien thanh
thong cong » trong cong, tong cong, thong thong
hanh hang » thanh hang, hang hang, hanh han
cua thong » cua thuong, cua khong, cua tong
hang cua » mang cua, hang ca, huong cua
cong san » cong tac
san van » tan van, luan van, tran 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 chanh) OR (dieu hanh))) OR (thien thanh)) - hanh hang cua thong cong san van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thien chanh) or (dieu hanh))) or (thien thanh)) - hanh hang cua thong cong san van ban*.