Perhaps you should try some spelling variations:
cong doanh » cong doan, dong doanh, rong doanh
hanh trinh » canh tranh, hanh chinh
luat hanh » luat hinh, luat canh, luat danh
cong danh » cuong danh, cong dan, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
hieu ca » hieu cac, hieu cua, hieu va
quan ha » quan he

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: doc hieu ca - hanh trinh luat hanh ((cong doanh) OR (cong danh)) quan ha~.
• Adding a wildcard symbol may retrieve word variants: doc hieu ca - hanh trinh luat hanh ((cong doanh) or (cong danh)) quan ha*.