Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hien tach » thien hach, chiet tach, vien bach
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
dan van » dang van, doan van, dao 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 hien tach - hanh tranh cua ((((nhung cong) OR (thong cong))) OR (bang cong)) dan van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - hanh tranh cua ((((nhung cong) or (thong cong))) or (bang cong)) dan van ban*.