Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, mot chieu
trinh han » trinh quan
cong cong » cong dong, trong cong, dung cong
doan phan » doanh phan, toan phan, dan phan
ho chieu » theo chieu, hoc thieu, mot chieu
han cong » phan cong, hang cong, hanh cong
van phan » van phong, van thanh, luan phan

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 chieu) OR (doi chieu)) tinh - hanh trinh han cong cong ((van phan) OR (doan phan)) cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) tinh - hanh trinh han cong cong ((van phan) or (doan phan)) cac~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) tinh - hanh trinh han cong cong ((van phan) or (doan phan)) cac*.