Perhaps you should try some spelling variations:
dien khanh » dien thanh, hien khanh, dieu hanh
hien hanh » dieu hanh
tranh va » tranh van, trang va, trinh va
va trong » va truong, va thong, va tuong
cong san » cong tac
san quan » van quan, ban quan, dan quan
quan ha » quan he

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dien khanh) or (hien hanh)) - canh tranh va trong cong san quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien khanh) OR (hien hanh)) - canh tranh va trong cong san quan ha.
• Adding a wildcard symbol may retrieve word variants: hoc ((dien khanh) or (hien hanh)) - canh tranh va trong cong san quan ha*.