Perhaps you should try some spelling variations:
doi chieu » doi chi, ho chieu, mot chieu
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
cong san » cong tac
san tuan » van tuan, san luan, san quan
tuan thu » toan thuc, van thu
va dang » van dang, 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)) xanh - canh tranh va dang cong san tuan thu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - canh tranh va dang cong san tuan thu".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - canh tranh va dang cong san tuan thu*.