Perhaps you should try some spelling variations:
doi chieu » doc hieu, mot chieu, ho chieu
thanh tra » thanh toan, thanh hoa
cong tang » cong thang, cong tan, cong vang
cong lang » cong vang, cong luong, cong quang
tra tran » tra trinh, thai tran, toan tran
quan tam » quan tai, quan am, quan nam
doi chi » doi khi

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: ((doi chieu) OR (doi chi)) sang - thanh tra tran quang ((cong tang) OR (cong lang)) quan tam~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (doi chi)) sang - thanh tra tran quang ((cong tang) or (cong lang)) quan tam~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (doi chi)) sang - thanh tra tran quang ((cong tang) or (cong lang)) quan tam*.