Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
hang cong » dang cong, hang nong, bang cong
cong doan » cong dan, cong hoan, dong doanh
doan phan » doanh phan, toan phan, dan phan
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (doc hieu)) tinh - canh tranh va hang cong doan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) tinh - canh tranh va hang cong doan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) tinh - canh tranh va hang cong doan phan tu*.