Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
cong san » cong tac
san tuan » van tuan, san luan, san quan
tuan thu » toan thuc, van thu
va dang » van dang, va nang, da dang
va lang » va nang, hoa 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 (ho chieu)) xanh - canh tranh ((va dang) OR (va lang)) cong san tuan thu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - canh tranh ((va dang) OR (va lang)) cong san tuan thu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - canh tranh ((va dang) OR (va lang)) cong san tuan thu".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - canh tranh ((va dang) OR (va lang)) cong san tuan thu*.