Perhaps you should try some spelling variations:
nang luong » nang song
luong cong » dung cong, trong cong, cong cong
hanh tran » hanh trang, thanh tran, hanh tram
tran nang » tra nang, tran dang, tran quang
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 trieu) OR (30 trieu)) tinh - hanh tran nang luong cong tan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) or (30 trieu)) tinh - hanh tran nang luong cong tan ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) or (30 trieu)) tinh - hanh tran nang luong cong tan ((toan cau) OR (toan ban))*.