Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
doi chieu » doi chi, ho chieu, mot chieu
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
cong van » cong vang, cong san, song van
tuan thu » toan thuc, van thu
va nang » van nang, da nang, cam nang

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 nang ((cong van) or (luong quang)) tuan thu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - canh tranh va nang ((cong van) OR (luong quang)) tuan thu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doc hieu)) xanh - canh tranh va nang ((cong van) or (luong quang)) tuan thu".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doc hieu)) xanh - canh tranh va nang ((cong van) or (luong quang)) tuan thu*.