Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
doi chieu » doc hieu, doi chi, mot chieu
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, mot chieu
canh dan » canh van, sanh dan, thanh dan
dan cua » dan ca, ban cua, dai cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - canh dan cua nhung cong quang ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - canh dan cua nhung cong quang ((toan ban) or (van ban))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - canh dan cua nhung cong quang ((toan ban) or (van ban))*.