Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trinh vat » trinh van, trinh luat, sinh vat
doan phan » doanh phan, toan phan, doanh nhan
dan phan » dan chan, van phan, dam phan
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - hanh trinh vat ((nhung cong) OR (thong cong)) ((doan phan) OR (dan phan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh vat ((nhung cong) or (thong cong)) ((doan phan) or (dan phan)) cau*.